expiry vs psychopomp

expiry

noun
  • Death. 

  • Synonym of expiration date 

  • End; termination; expiration. 

psychopomp

noun
  • A spirit, deity, person, etc., who guides the souls of the dead to the afterlife. 

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