ambition vs fair game

ambition

noun
  • A desire, as in (sense 1), for another person to achieve these things. 

  • Eager or inordinate desire for some object that confers distinction, as preferment, honor, superiority, political power, or fame; desire to distinguish one's self from other people. 

  • An object of an ardent desire. 

  • A personal quality similar to motivation, not necessarily tied to a single goal. 

verb
  • To seek after ambitiously or eagerly; to covet. 

fair game

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

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

  • 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 ambition and fair game occurred in a corpus of books? (source: Google Ngram Viewer )