I am not making this up or exaggerating.
In 1988, NBC showed the Summer Olympics from Seoul, South Korea (that's the one where Ben Johnson and Carl Lewis got caught doing illegal drugs but only Johnson got his name besmirched and Lewis acted like the arrogant hypocrite he is) and some reputable TV watchers with their clocks timed the coverage throughout.
For every hour of coverage for which they'd paid billions, NBC showed 26 minutes of actual Olympics and 34 minutes of commercials. One pundit quipped, "It was nice of NBC to give us a break from all those commercials with a real quick sporting event here and there."