cherish vs hold onto

cherish

verb
  • To have a deep appreciation of; to hold dear. 

  • To treat with affection, care, and tenderness; to nurture or protect with care. 

hold onto

verb
  • Used other than figuratively or idiomatically: see hold, onto. 

  • To manage to keep something. 

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