footy vs international football

footy

noun
  • Football (association football) (soccer in US, Canada, Australia, New Zealand) 

  • A football fan. 

  • The game or sport of football, usually Australian rules football or rugby league, but not soccer 

  • The ball used in a game of footy. 

  • A short sock. 

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 footy and international football occurred in a corpus of books? (source: Google Ngram Viewer )