association football vs international football

association football

noun
  • A ball game played between two teams of eleven players, each attempting to win by scoring more goals than their opponent. 

international football

noun
  • Soccer. 

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

  • The combination of Canadian football and American football. 

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