Bronco doesn't work more hours than, oh, let's just say 50% of his peers. Should be easy since you don't think he works harder than any of them.
All you need to do is nail down Bronco's exact schedule plus the exact schedule of 60 other coaches.
This is not a defense of Bronco, only a thrashing of your post. For all I know, Bronco is among the least working of all FBS coaches. There really isn't much of a way of knowing whether that's true or not, though.