Question: Petersen's 4-Wheel & Off-Road began as a publication that is now released how often?

<P0-S0> Petersen's 4-Wheel & Off-Road is a magazine dedicated to 4x4 and off-road trucks and SUVs. <P0-S1>  The first issue was published in 1977; it began as a special-interest publication from the editors of Hot Rod magazine. <P0-S2>  "4-Wheel & Off-Road" covers a range of topics for the do-it-yourself light-truck enthusiast, including real-world 4x4 performance modifications, new products and product evaluations, off-road event coverage, new-vehicle evaluations, travel, and lifestyle. <P0-S3>  In March 1978, the magazine officially became a monthly publication, and in 2013, "4-Wheel & Off-Road" celebrated its 35th anniversary. <SEP> <P1-S0> Hot Rod is a monthly American car magazine devoted to hot rodding, drag racing, and muscle cars — modifying automobiles for performance and appearance. <SEP> <P2-S0> Petersen Rock Garden, formerly Petersen's Rock Garden and also known as the Petersen Rock Gardens, is a rock garden and museum on 4 acre , located between the cities of Bend and Redmond in Deschutes County, Oregon, United States. <P2-S1>  Rasmus Petersen, a Danish immigrant who settled in Central Oregon in the early 1900s, began constructing the garden in 1935 using rocks he found within an 85 mi radius of his family home. <P2-S2>  Petersen constructed detailed miniature castles, churches and other small buildings and monuments from a variety of rock types. <P2-S3>  He incorporated other design elements such as bridges, water features and natural landscaping. <P2-S4>  Petersen worked on the garden until his death in 1952; the garden has remained in his family's care since then. <P2-S5>  The garden, considered a roadside attraction with novelty architecture, includes roaming peafowl and a museum with a gift shop that sells rocks. <SEP> <P3-S0> Trucks and Tractor Power was a long running weekly television show on TNN featuring mud bogging, tractor pulling and monster trucks. <P3-S1>  The show's original hosts were Stan Rhoads and former Bigfoot driver Rich Hooser, along with pit reporter Mike Goss. <P3-S2>  Gary Lee replaced Stan Rhoads. <P3-S3>  Army Armstrong later joined as a pit reporter, and later, when Hooser left the show, became color commentator. <P3-S4>  The show initially began in 1989 as a vehicle for TNT Motorsports events, complimenting their ESPN show Powertrax and syndicated show Tuff Trax, and would typically alternate between truck and tractor pulls and monster trucks, with National Mud Racing Organization mud races intermittently. <P3-S5>  After TNT was bought out by the United States Hot Rod Association in 1991, the show began primarily airing the Pendaliner Monster Truck Series and NMRO mud races held at Special Events' 4-Wheel and Off-Road Jamborees. <P3-S6>  A frequent feature of these shows was a highlight segment of "Tough Truck" amateur off-road races near the end of the monster truck episodes. <P3-S7>  The final season of Trucks and Tractor Power had Gary Lee as the host at the Monster Truck Thunder Drags, with Dave Rief, and later Tom Rivers, for the Jamborees. <P3-S8>  At the end of the 1996 season, the Pendaliner cancelled their sponsorship of the monster truck series, causing the show to be subsequently cancelled.