According to Schulz, Frieda's character was inspired by his longtime friend Frieda Rich, a local artist whom he met while taking classes at the Art Instruction Schools in Minneapolis, Minnesota. She was a regular in "Peanuts" throughout the 1960s, but as newer characters were phased in towards the end of the decade, she began appearing less often, and she ceased to be a featured character after 1985, making only cameo appearances since then in various television specials. Her full name was revealed in the 2015 film "The Peanuts Movie" as Frieda Rich, where she places 12th in the test results.