Complex sentence: Schlessinger's stint on Ballance's show led to her own shows on a series of small radio stations, and by 1979 she was on the air Sunday evenings from 9:00 to midnight on KWIZ in Santa Ana, California.
Split into simpler sentences: Schlessinger's stint on Ballance's show led to her own shows on a series of small radio stations. By 1979 she was on the air Sunday evenings from 9:00 to midnight on KWIZ in Santa Ana, California.