appendage vs decrement

appendage

noun
  • A part that is joined to something larger. 

  • An external body part that projects from the body. 

  • A natural prolongation or projection from a part of any organism. 

decrement

noun
  • A small quantity removed or lost. One of a series of regular subtractions. 

verb
  • To decrease a value by a basic quantity unit. 

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