critic vs polemist

critic

noun

  • A person who appraises the works of others. 

  • A specialist in judging works of art. 

  • An opponent. 

  • One who criticizes; a person who finds fault. 

polemist

noun

  • A polemicist 

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