fair game vs object

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. 

object

noun
  • Objective; goal, end or purpose of something. 

  • A person or thing toward which an emotion is directed. 

  • An instantiation of a class or structure. 

  • An instance of one of the two kinds of entities that form a category, the other kind being the arrows (also called morphisms). 

  • A thing that has physical existence but is not alive. 

  • The noun phrase which is an internal complement of a verb phrase or a prepositional phrase. In a verb phrase with a transitive action verb, it is typically the receiver of the action. 

verb
  • To disagree with or oppose something or someone; (especially in a Court of Law) to raise an objection. 

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