Cindy's worst coach was Tubbs, and even he managed to muster a Conference Title.
Dino was the only one that didn't, and he turned out ok.
Agreed. I was responding to BAB who mentioned Cinci, but then followed up with "leaving out mid-majors who can be easily plucked".
I think it's definitely possible for mid-majors to do that if they've got good management at the top, because if you show promise there you're not being replaced because you got fired, it's because you took a bigger job. Boise State had that going for a number of years too, but I don't recall how many in a row over how long.
From the P5 group, however, I don't think it's very common to replace that many coaches over that time period and maintain success. Unless they're going to the NFL, they're not being "plucked", and there just aren't that many NCAA HC -> NFL HC moves each year, so to cluster that many in one team is rare.
In the P5, if you're looking at an average tenure of 3-4 years (allowing 12 years of 4-year coaches and two potentially longer term coaches as bookends for your 15 years), it's rare that those 3-4 year coaches in the middle of that sandwich are very productive, or they'd not get bounced that quickly.