get in vs help oneself

get in

verb
  • Used other than figuratively or idiomatically: see get, in. 

  • To be elected to some office. 

  • To become dark earlier as a result of seasonal change; to draw in. 

  • To enter a place; to gain access. 

  • To get into or inside something, literally or figuratively. 

  • To secure membership at a selective school. 

  • To arrive. 

intj
  • An exclamation of joy at one's success. 

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 get in and help oneself occurred in a corpus of books? (source: Google Ngram Viewer )