Iowa will play every other B1G team at least twice (1 home, 1 away) every four years. Sure tOSU will play Michigan every year, but you don't know that Iowa will play tOSU, Michigan, USC, etc., "less frequently than every other B1G team."However, because Iowa is the only B1G team with 3 protected rivals, they are going to play Ohio State, Michigan, USC (and all teams not named Neb/Minn/Wisc) less frequently than every other B1G team will face them.