abdication vs denialist

abdication

noun
  • The act of abdicating; the renunciation of a high office, dignity, or trust, by its holder. 

  • The voluntary renunciation of sovereign power. 

denialist

noun
  • One who denies an assertion in a controversial debate. 

adj
  • Relating to denial in a controversial debate. 

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