Canadian football vs international football

Canadian football

noun
  • A game similar to American football played on a field of 110 yards long and 65 yards wide (with two 20 yard-long endzones) in which two teams of 12 players attempt to get an ovoid ball to the end of each other's territory. 

international football

noun
  • The combination of Canadian football and American football. 

  • Used other than figuratively or idiomatically: see international, football. 

  • Soccer. 

How often have the words Canadian football and international football occurred in a corpus of books? (source: Google Ngram Viewer )