come apart vs help oneself

come apart

verb
  • Used other than figuratively or idiomatically: see come, apart. 

  • to break, separate. 

help oneself

verb
  • Used other than figuratively or idiomatically: see help. 

  • To serve oneself, especially to take food or other supplies, rather than wait to be served by another; used to indicate friendly permission or invitation. 

  • To exhibit self-control. 

  • To take something freely; to serve oneself without restraint. 

How often have the words come apart and help oneself occurred in a corpus of books? (source: Google Ngram Viewer )