castoff vs denialism

castoff

noun
  • Something that has been rejected or discarded; a reject. 

adj
  • discarded, rejected. 

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. 

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