acceptability vs legitimateness

acceptability

noun
  • The quality of being acceptable; acceptableness. 

  • Operation plan review criterion. The determination as to whether the contemplated course of action is worth the cost in manpower, materiel, and time involved; is consistent with the law of war; and is militarily and politically supportable. (JP 1-02 Department of Defense Dictionary of Military and Associated Terms) 

legitimateness

noun
  • The quality of being legitimate. 

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