Aunt Sally vs fair game

Aunt Sally

name
  • A traditional game in which balls are thrown to break the pipe in the mouth of a figurine resembling an old woman. 

  • A figure drawing criticism or ridicule, especially when prejudiced or unwarranted. 

fair game

noun
  • An acceptable subject or target for criticism, scrutiny, mockery, or attack. 

  • A goal or an object that may legitimately be sought. 

  • Actions permissible by the rules. 

  • Used other than figuratively or idiomatically: see fair, game.: a game that is fair, that does not involve cheating, etc. 

How often have the words Aunt Sally and fair game occurred in a corpus of books? (source: Google Ngram Viewer )