Complex sentence: Florida and Tennessee met infrequently for over half a century, often going many years without facing off on the gridiron-from 1916 to 1969, they played on a total of 13 occasions.
Split into simpler sentences: Florida and Tennessee met infrequently for over half a century, often going many years without meeting on the gridiron. From 1916 to 1969, they played on a total of 13 occasions.