come clean vs feign

come clean

verb
  • To confess; admit the truth. 

  • 1921, B. M. Bower, chapter 6, in Sawtooth Ranch 

  • 1977 Oct. 23, John Gardner, "The World Of Tolkien," New York Times (retrieved 12 Sept 2013) 

  • 2005 August 8, "Quotes of the Day," Time (retrieved 12 Sept 2013) 

feign

verb
  • To hide or conceal. 

  • To make an action as if doing one thing, but actually doing another, for example to trick an opponent; to feint. 

  • To make a false show or pretence of; to counterfeit or simulate. 

  • To imagine; to invent; to pretend to do something. 

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