denialist vs denier

denialist

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

adj
  • Relating to denial in a controversial debate. 

denier

noun
  • One who denies the existence of something. 

  • One who denies or forbids something. 

  • An old French coin worth one-twelfth of a sou. 

  • A unit of linear density which indicates the fineness of fiber or yarn, equal to one gram per 9000 meters, used especially to measure or indicate the fineness of hosiery. Originally equal to the weight of a denier coin per 9600 aunes. 

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