Question: Jack and Jill and The Believer, are distributed how often?

Context paragraphs:
Jack and Jill: A Village Story: Jack and Jill: A Village Story by Louisa May Alcott, is a children's book originally published in 1880.  It takes place in a small New England town after the Civil War.  The story of two good friends named Jack and Janey, "Jack and Jill" tells of the aftermath of a serious sledding accident.

Mythology of The X-Files: The mythology of "The X-Files", sometimes referred to as its "mytharc" by the show's staff and fans, follows the quest of FBI Special Agents Fox Mulder (David Duchovny), a believer in supernatural phenomena, and Dana Scully (Gillian Anderson), his skeptical partner.  Their boss, FBI Assistant Director Walter Skinner, was also often involved.  Beginning with season 8, another skeptic named John Doggett, and Monica Reyes, a believer like Mulder, were also introduced.  The overarching story, which spans events as early as the 1940s, is built around a government conspiracy to hide the truth about alien existence and their doomsday plan.  Not all episodes advanced the mythology plot, but the ones that did were often set up by Mulder or Scully via an opening monologue.

Bar jack: The bar jack ("Caranx ruber") (also known as the carbonero, red jack, blue-striped cavalla and passing jack) is a common species of inshore marine fish classified in the jack family, Carangidae.  The bar jack is distributed through the western Atlantic Ocean from New Jersey and Bermuda in the north to Venezuela and possibly Brazil in the south, with the largest population in the Gulf of Mexico and West Indies.  The bar jack is most simply distinguished from similar jacks by its dark horizontal bar which runs along the back and down the caudal fin, often accompanied by an electric blue stripe immediately below it.  Other more detailed differences include dentition and soft ray counts.  The bar jack is a moderately large species, growing to a recorded maximum of 65 cm and a weight of 6.8 kg.  The species inhabits clear shallow waters, often over coral reefs where it lives either solitarily or in large schools, taking various fishes, crustaceans and cephalopods as prey.  Studies in Cuba indicate spawning occurs between March and August, with sexual maturity reached at 26 cm.  It is a relatively popular sport fish and can be caught on light tackle with a variety of lures and baits.  It is considered to be a good food fish, however many recorded ciguatera cases are attributed to the species, with most cases reported on the island of St. Thomas traced to this single species.

Eric Stephens (comics): Eric Stephens (1909–2001) was a British comic strip artist who contributed to "Jack and Jill", drawing episodes of the cover strip 'Jack and Jill of Buttercup Farm' and colouring a number of centre-spread features such as 'There Was An Old Woman Who Lived in a Shoe' and 'Our Village'.  Stephens also contributed episodes of 'Sonny and Sally' to "Playhour" and 'Paddington Park' to "Bonnie".

The Believer (magazine): The Believer is a bi-monthly magazine of interviews, essays, and reviews.  Founded by the writers Heidi Julavits, Vendela Vida, and Ed Park in 2003, the magazine is a five-time finalist for the National Magazine Award, with contributors ranging from literary luminaries such as Hilton Als, Anne Carson, Nick Hornby, Susan Straight, and William T. Vollmann to emerging talents for whom the magazine has been a proving ground, including Eula Biss, Gideon Lewis-Kraus, Leslie Jamison, Rachel Kaadzi Ghansah, Kent Russell, and Rivka Galchen.

Four Jacks and a Jill: Four Jacks and a Jill is a South African folk rock ensemble.  They originally formed in 1964 without a "Jill" under the name "The Nevadas".  Subsequently, they became the first group in South Africa to wear their hair long and they changed their name to "The Zombies" (different from the well-known British group).  Later they added lead singer Glenys Lynne and changed the group's name to "Four Jacks and A Jill".  The group included Clive Harding (bass guitar), Till Hanamann (rhythm guitar, trumpet and organ), Bruce Bark (lead guitar, harmonica and saxophone), Tony Hughes (drums) and Glenys Lynne (lead vocal and organ).  In South Africa, they had a hit song, "Timothy".  In 1968 they cracked the American charts with the song "Master Jack", hitting the "Billboard" Hot 100 at no. 18 and reaching no. 3 on the Adult Contemporary chart.  The song also reached no. 10 on Cashbox and went to no. 1 in South Africa, Canada, Australia, New Zealand, Malaysia, and Rhodesia (now Zimbabwe).  The follow-up single, "Mr. Nico", peaked at no. 98 in the United States.  That was their last hit in the U.S., but the group continued to score hits in their native country.

Jack Horner (comics): Jack Horner is a fictional character in the comic book series "Fables" by Bill Willingham.  His first appearance was in issue #1 of "Fables" and continued as a regular character of the series until leaving the series for his own title, "Jack of Fables".  The character is based on various nursery rhymes and fables with characters named Jack including "Little Jack Horner", "Jack and the Beanstalk", "Jack and Jill", Jack Be Nimble, Jack Frost, Jack O'Lantern, and Jack the Giant Killer and others.

Consideration under American law: Consideration is the central concept in the common law of contracts and is required, in most cases, for a contract to be enforceable.  Consideration is the price one pays for another's promise.  It can take a number of forms: money, property, a promise, the doing of an act, or even refraining from doing an act.  In broad terms, if one agrees to do something he was not otherwise legally obligated to do, it may be said that he has given consideration.  For example, Jack agrees to sell his car to Jill for $100.  Jill's payment of $100 (or her promise to do so) is the consideration for Jack's promise to give Jill the car, and Jack's promise to give Jill the car is consideration for Jill's payment of $100.

Jack and Jill (magazine): Jack and Jill is an American bimonthly magazine for children 7 to 12 years old that takes its title from the nursery rhyme of the same name.  It features stories and educational activities.

Mighty Jill Off: Mighty Jill Off is a 2D platform independently developed freeware video game designed by Anna Anthropy, with art by James Harvey and music by Andrew Toups.  It stars a submissive named Jill, who has a boot fetish and is forced to climb up a tower after her Queen kicks her down it as punishment.  Jill does this by jumping and slowly descending over obstacles.  Jill can be defeated in one hit by these obstacles, but will return to the last check point.  The game serves as an homage to the 1986 arcade game "Mighty Bomb Jack".  It had follow-ups, such as "Mighty Jill Off - Jill Off Harder Edition" and "Jill Off With One Hand".  Jill made a cameo appearance in the 2010 video game "Super Meat Boy" as a playable character.

Supporting paragraphs: Jack and Jill (magazine) The Believer (magazine)
Answer: bi-monthly