cop out vs elude

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. 

elude

verb
  • To evade or escape from (someone or something), especially by using cunning or skill. 

  • To escape being understandable to; to be incomprehensible to. 

  • To escape someone's memory, to slip someone's mind. 

  • To shake off (a pursuer); to give someone the slip. 

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