bookfell vs piece of paper

bookfell

noun

  • A skin prepared for writing upon; a sheet of vellum or parchment; paper. 

  • A vellum or parchment manuscript. 

piece of paper

noun

  • A single sheet or scrap of paper. 

  • A marriage certificate. 

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