Looking at some helmet teams, year-by-year, seeing which squads would warrant 2 QB cards:
Nebraska - 1975, 77, 79, 81, 84, 85, 90, 92, 98, 07, 13
Alabama - 1973, 74, 75, 81, 84, 87, 91, 95, 01, 02, 04
Notre Dame - 1975, 77, 80, 81, 83, 87, 00, 07, 10
So that's quite a few - more than I would've guessed. I assume most big-time programs are similar to these, maybe fewer if they ditched the option earlier on, idk.
Hmmph. This has been sort of a rabbit hole, but I'm glad we've gone down it, and again, creating a QB card is quick and easy. So might as well make 'em.