cave in vs overtake

cave in

noun
  • The act of something collapsing or caving in. 

  • The act of relenting. 

  • The location where something has caved in. 

verb
  • To collapse inward or downward. 

  • To relent; to grant approval against one's initial will. 

overtake

noun
  • An act of overtaking; an overtaking maneuver. 

verb
  • To become greater than something else 

  • To occur unexpectedly; take by surprise; surprise and overcome; carry away 

  • To pass a slower moving object or entity (on the side closest to oncoming traffic). 

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