acroamatic vs familiar

acroamatic

adj
  • Based on lectures or exposition by monologue. 

  • Esoteric, abstruse; (in particular) taught orally to select students and not disseminated. 

familiar

noun
  • An attendant spirit, often in animal or demon form. 

  • The officer of the Inquisition who arrested suspected people. 

  • A member of a pope's or bishop's household. 

adj
  • Of or pertaining to a family; familial. 

  • Known to one, or generally known; commonplace. 

  • Intimate or friendly. 

  • Acquainted. 

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