A lot of what 50+ posted applied well into the 90's. The 1992 NC run saw Bama on ABC five times, ESPN once, and Jefferson-Pilot twice. Five games were on PPV only. Ten years earlier, in 1982, Bama was on TV a total of 3 times including the Bowl that was on MediaSports so probably just regional. Radio was huge for us back then.
One thing to remember is the NCAA controlled broadcasting until 1984. They originally only allowed one national game per week then changed it to 8 national games a week and regional only during 5 weeks of the season. That changed in 1984 when Oklahoma and UGA won their lawsuit against the NCAA.