cave in vs dispute

cave in

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

  • To collapse inward or downward. 

noun
  • The act of relenting. 

  • The location where something has caved in. 

  • The act of something collapsing or caving in. 

dispute

verb
  • to oppose by argument or assertion; to controvert; to express dissent or opposition to; to call in question; to deny the truth or validity of 

  • to make a subject of disputation; to argue pro and con; to discuss 

  • to strive or contend about; to contest 

  • to contend in argument; to argue against something maintained, upheld, or claimed, by another. 

noun
  • Verbal controversy or disagreement; altercation; debate. 

  • An argument or disagreement, a failure to agree. 

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