buy into vs put in

buy into

verb
  • To buy stocks or shares of (a business). 

  • To believe; to accept a craze or fad as valid. 

put in

verb
  • To apply, request, or submit. 

  • To call at (a place or port), especially as a deviation from an intended journey. 

  • To contribute. 

  • To place inside. 

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