pensionary vs superannuitant

pensionary

noun
  • one who receives a pension; a pensioner 

  • A leading functionary and legal adviser of the principal town corporations in the Netherlands. 

adj
  • pertaining to a pension 

  • maintained by a pension; receiving a pension 

superannuitant

noun
  • One who has a superannuation, or retirement benefit fund. 

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