international football vs soccer football

international football

noun
  • Soccer. 

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

  • The combination of Canadian football and American football. 

soccer football

noun
  • Synonym of soccer ball 

  • Synonym of association football 

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