The 1919 NCAA football season had no clear-cut champion, with the "Official NCAA Division I Football Records Book" listing Centre, Harvard, Illinois, Notre Dame, and Texas A&M as having been deemed national champions by major selectors Only Harvard, Illinois, and Texas A&M claim national championships for the 1919 season. Texas A&M began claiming the 1919 national championship in 2012.
Texas A&M claimed their championship over 77 years after they won it.
They claimed it in 2012 after winning it in 1919. That was 93 years after they won it. 93 is greater than 77 so they claimed it over 77 years after they won.