codicil vs tailpiece

codicil

noun
  • Any appendix or addition. 

  • An addition or supplement that explains, modifies, or revokes a will or part of one. 

  • An addition or supplement modifying any official document, such as a treaty. 

verb
  • To add a codicil to something. 

tailpiece

noun
  • An appendage or appendix. 

  • An element, often triangular, to which the strings of a violin, guitar, etc. are attached at the lower end of an instrument. 

  • A short joist between a header and a wall. 

  • The part of a telescope containing the adjusting device for the eyepiece, etc. 

  • The part of a lock that transmits motion from the hub to the latch bolt. 

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