cave in vs demur

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. 

demur

noun
  • An act of hesitation as to proceeding; a scruple; also, a suspension of action or decision; a pause, a stop. 

verb
  • To interpose a demurrer. 

  • To delay; to pause; to suspend proceedings or judgment in view of a doubt or difficulty; to hesitate; to put off the determination or conclusion of an affair. 

  • To scruple or object; to take exception; to oppose; to balk 

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