denial vs testimonial

denial

noun
  • A disownment or disavowal 

  • An assertion of untruth. 

  • Refusal to believe that a problem exists. 

  • A defense mechanism involving a refusal to accept the truth of a phenomenon or prospect. 

  • Refusal to admit responsibility for wrongdoing. 

  • A refusal or failure to provide or grant something that is requested or desired. 

  • Negationism, denialism of historical facts or accepted interpretation. 

  • The negation in logic. 

testimonial

adj
  • Serving as testimony. 

noun
  • A statement, especially one given under oath; testimony 

  • A match played in tribute to a particular player (who sometimes receives a proportion of the gate money). 

  • A tribute given in appreciation of someone's service etc. 

  • A written recommendation of someone's worth or character 

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