hassock vs prie-dieu

hassock

noun
  • A cushion used primarily in churches for kneeling on while praying. 

  • A thick cushion used as a seat; an ottoman or pouffe. 

  • A dense clump of grass or vegetation; a tussock. 

prie-dieu

noun
  • A piece of furniture on which someone can pray, consisting of a cushioned area to kneel on, with a built-in ledge for books. 

How often have the words hassock and prie-dieu occurred in a corpus of books? (source: Google Ngram Viewer )