appropriate vs help oneself

appropriate

verb
  • To take to oneself; to claim or use, especially as by an exclusive right. 

  • To set apart for, or assign to, a particular person or use, especially in exclusion of all others; with to or for. 

  • To annex (for example a benefice, to a spiritual corporation, as its property). 

adj
  • Suitable or fit; proper. 

  • Suitable to the social situation or to social respect or social discreetness; socially correct; socially discreet; well-mannered; proper. 

help oneself

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

  • 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. 

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