Yankee football vs handegg

Yankee football

noun
  • Synonym of American football 

handegg

noun
  • The ball used to play such a game. 

  • Any of the sports that are called football but are played mainly with the hands and with a prolate spheroid ball; that is, American football and (less often) Canadian and Australian football. 

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