Question: Saying Grace by Normal Rockwell was painted for the cover of a magainze that was published weekly during what time period?

Context paragraphs:
List of Florida hurricanes (1950–74): The list of Florida hurricanes from 1950 to 1974 encompasses 85 Atlantic tropical or subtropical cyclones that affected the U.S. state of Florida.  Collectively, tropical cyclones in Florida during the time period resulted in about $7.04 billion (2017 USD) in damage, primarily from Hurricanes Donna and Dora.  Additionally, tropical cyclones in Florida were directly responsible for 93 fatalities during the period, as well as responsible for 23 indirect deaths.  Several tropical cyclones produced over 20 inches (500 mm) of rainfall in the state, including Hurricane Easy which is the highest total during the time period.  The 1969 season was the year with the most tropical cyclones affecting the state, with a total of 8 systems.  The 1954 and 1967 seasons were the only years during the time period in which a storm did not affect the state.

Saying Grace (painting): Saying Grace is a 1951 painting by American illustrator Norman Rockwell, painted for the cover of "The Saturday Evening Post"'s November 24, 1951, Thanksgiving issue.

Shōjo Comic: Shōjo Comic (少女コミック ) is a shōjo manga magazine published twice monthly in Japan by Shogakukan since 1968.  It was originally published weekly and it continued to be published weekly until the 1980s.  Many influential shōjo manga ran in "Shōjo Comic" during the 1970s.  Moto Hagio's works and Keiko Takemiya's works in particular were very groundbreaking.

Norman Rockwell: Norman Perceval Rockwell (February 3, 1894 – November 8, 1978) was a 20th-century American author, painter and illustrator.  His works enjoy a broad popular appeal in the United States for its reflection of American culture.  Rockwell is most famous for the cover illustrations of everyday life he created for "The Saturday Evening Post" magazine over nearly five decades.  Among the best-known of Rockwell's works are the "Willie Gillis" series, "Rosie the Riveter", "The Problem We All Live With", "Saying Grace", and the "Four Freedoms" series.  He also is noted for his 64-year relationship with the Boy Scouts of America (BSA), during which he produced covers for their publication "Boys' Life", calendars, and other illustrations.  These works include popular images that reflect the "Scout Oath" and "Scout Law" such as "The Scoutmaster", "A Scout is Reverent" and "A Guiding Hand", among many others.

RockA: Rocka (RockA with the official spelling) is a Turkish music band, formed in 2005 in Ankara, generally producing works in Nu Metal, Rapcore, Alternative Rock.  Band, with producing amateur works for a long time period found a place in important activities and festivals and published their first major production in 2012 from DMC Music Company.  Receiving support from Tarkan with the cover work of Tarkan (singer)'s cult song once affected a time period, published in 1997 "Ölürüm Sana" and Tarkan (singer)'s accompanying them in their music video turned all the medias eye to RockA in an instant.

Tough Call: Tough Call – also known as Game Called Because of Rain, Bottom of the Sixth, or The Three Umpires – is a 1948 painting by American artist Norman Rockwell, painted for the April 23, 1949, cover of "The Saturday Evening Post" magazine.  The original painting is in the collection of the National Baseball Hall of Fame.  It is considered the best known of Rockwell's baseball-themed works, and appears in at least ten Rockwell commentary books.

Integrating ADC: An integrating ADC is a type of analog-to-digital converter that converts an unknown input voltage into a digital representation through the use of an integrator.  In its basic implementation, the dual-slope converter, the unknown input voltage is applied to the input of the integrator and allowed to ramp for a fixed time period (the run-up period).  Then a known reference voltage of opposite polarity is applied to the integrator and is allowed to ramp until the integrator output returns to zero (the run-down period).  The input voltage is computed as a function of the reference voltage, the constant run-up time period, and the measured run-down time period.  The run-down time measurement is usually made in units of the converter's clock, so longer integration times allow for higher resolutions.  Likewise, the speed of the converter can be improved by sacrificing resolution.

The Saturday Evening Post: The Saturday Evening Post is an American magazine published six times a year.  It was published weekly under this title from 1897 until 1963, then every two weeks until 1969.  From the 1920s to the 1960s, it was one of the most widely circulated and influential magazines for the American middle class, with fiction, non-fiction, cartoons and features that reached millions of homes every week.  The magazine declined in readership through the 1960s, and in 1969 "The Saturday Evening Post" folded for two years before being revived as a quarterly publication in 1971.

Grace (prayer): A grace is a short prayer or thankful phrase said before or after eating.  The term most commonly refers to Christian traditions.  Some traditions hold that grace and thanksgiving imparts a blessing which sanctifies the meal.  In English, reciting such a prayer is sometimes referred to as "saying grace".

Population change: Human population change is the difference between the size of the population from the beginning to the end of a certain time period.  In other words, population change refers to change in the number of people during a specific time period.  As a whole,the world population has not been stable; it has increased manifold.  Due to this constant changing population, the subject of demographics, the statistics of how many people there are in a given population, was created.  Demography can also be defined as the study of populations, and the factors that cause the most amount of population growth or decline.  The main measurements of demography include: birth rates, death rates, sex ratios, life expectancy, and migration rates.  All of these measures are found by a series of surveys and censuses conducted over a time period in order to compare how the population is changing.  Other ways to measure population demographics include the use of historical maps, aerial photographs, and census statistics.  One of the reasons why demographers use statistics about population change is because of the social and demographic transformations that the world experiences; significant challenges for the government and businesses will take effect depending on the degree of the population change.

Supporting paragraphs: Saying Grace (painting) The Saturday Evening Post
Answer: 1897 until 1963