advisability vs permissibility

advisability

noun
  • An instance of advisability; a consideration in determining overall advisability. 

  • The quality of being advisable or prudent. 

permissibility

noun
  • The condition of being permissible; legitimacy; allowability. 

  • A permissible act. 

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