Wow, yikes. Just took a closer look and I was definitely off in thinking so many of the B1G teams scheduled P5s regularly in their OOC. My apologies for that.
I guess I'm accustomed to the B12 where pretty much only Baylor schedules three pastries every single year. Makes me want to investigate though, that's for sure.
Here's the B12, number of P5 teams over the past 5 seasons, in order from 2019 down to 2015 (*counting Notre Dame as a P5 team for this analysis)
TCU: 10,10,10,10,10
Texas: 10, 11, 11, 11, 11
Texas Tech: 10, 10, 10, 10, 10
OU: 10, 10, 10, 10, 10
oSu: 10, 9, 10, 10, 9
WVU: 11, 11, 10, 10, 10
KSU: 10, 10, 10, 10, 9
ISU: 10, 10, 10, 10, 10
KU: 10, 10, 9, 9, 10
BU: 9, 10, 10, 9, 9