append vs attach

append

verb
  • To add, as an accessory to the principal thing; to annex 

  • To write more data to the end of a pre-existing file, string, or other object. 

  • To hang or attach to, as by a string, so that the thing is suspended 

noun
  • An instance of writing more data to the end of an existing file. 

attach

verb
  • To adhere; to be attached. 

  • To connect, in a figurative sense; to ascribe or attribute; to affix; with to. 

  • To win the heart of; to connect by ties of love or self-interest; to attract; to fasten or bind by moral influence; with to. 

  • To come into legal operation in connection with anything; to vest. 

  • To fasten, to join to (literally and figuratively). 

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