international football vs international rules football

international football

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

  • The combination of Canadian football and American football. 

  • Soccer. 

international rules football

noun
  • A sport created as a mixture of Australian rules football and Gaelic football, to allow international matches between Australia and Ireland. 

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