appendix vs shortening

appendix

noun
  • A text added to the end of a book or an article, containing additional information. 

  • Any process, prolongation, or projection. 

  • The vermiform appendix. 

shortening

noun
  • Fat that is solid at room temperature, such as margarine or lard (not usually used of butter), used to make shortcrust pastry. 

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