hassock vs throw pillow

hassock

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

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

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

throw pillow

noun
  • A small pillow, especially one placed on a chair or sofa rather than on a bed, used for decoration rather than comfort. 

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