cave in vs stand out

cave in

noun
  • The act of relenting. 

  • The location where something has caved in. 

  • The act of something collapsing or caving in. 

verb
  • To collapse inward or downward. 

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

stand out

verb
  • To persist in opposition or resistance (against something); to refuse to comply (with someone). 

  • To be obvious or conspicuous, in contrast to the surroundings. 

  • To sail in a direction away from shore. 

  • To be extraordinary and different or to have features and qualities which make someone or something special. 

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