denialism vs refutation

denialism

noun
  • The practice of rejecting propositions which are strongly supported by scientific or historical evidence, and often of seeking to influence policy processes and outcomes accordingly. 

refutation

noun
  • An act of refuting or disproving; the disproving of an argument, opinion, testimony, doctrine or theory by argument or countervailing proof; evidence of falseness. 

  • A vocal answer to an attack on one's assertions. 

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