There are 10 conference schedules that rotate over a ten season period.
ie.. in a season ending with 1, all the schedules for a particular school across all worlds is the same. So season 91, 101, 111, 121, 131... will be the same for any given school across all worlds. And seasons #95, 105, 115, 125, 135, 145.... will have the same conference schedules.
Arizona is one that gets a lot of double byes in conference slots 17 & 18.
double byes to end the season in seasons ending in; 0, 1, 2, 7, 8, 9. With all six seasons playing Washington and Washington State before the double byes.
Plus two seasons (#5 & #6) with the double bye coming in slots 16 & 17.
Conference schedules usually don't change much from season to season. Often with 3-4 teams rotating to fill the same slot every season.
For Arizona: slot/game 1 is; seasons ending #0: Cal-home, season #1: Stanford-away, #2: Stanford-home, #3: Hawaii-home, #4: Hawaii-away, #5: Cal-home, #6: Cal-away, #7: Stanford-away, #8: Stanford-home, #9: Cal-away
So that makes 4 openers vs Cal, 4 openers vs Stanford, 2 openers vs Hawaii.
Slot #2 has Hawaii 4 times, Cal-2, Stanford-2, Fresno-2
...
Slot #17 has eight byes and Fresno 2 times
Slot #18 has 6 byes, Cal twice, Arizona State twice