fit in vs harmonize

fit in

verb
  • To suit or conform to. 

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

  • To be of a like type with others; to be socially accepted. 

harmonize

verb
  • To bring things into harmony, or to make things compatible. 

  • To provide parts to. 

  • To provide the harmony for a melody. 

  • To be in harmonious agreement. 

  • To play or sing in harmony. 

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