denialism vs disputation

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. 

disputation

noun
  • A rhetorical exercise in which parties reason in opposition to each other on some question proposed. 

  • The act of disputing; a dispute or argument. 

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