cop out vs resign

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. 

resign

verb
  • To submit passively; to give up as hopeless or inevitable. 

  • To quit (a job or position). 

  • To give up; to relinquish ownership of. 

  • To hand over (something to someone), place into the care or control of another. 

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