cop out vs defy

cop out

verb
  • To avoid or shirk, either by failing to perform, or by performing in a grossly insufficient, negligent, or superficial manner. 

  • To plead guilty and ask for mercy. 

defy

verb
  • To refuse to obey. 

  • To challenge (someone) or brave (a hazard or opposition). 

  • To not conform to or follow a pattern, set of rules or expectations. 

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