adulator vs bootlicker

adulator

noun
  • One who lavishes excessive praises or flattery; one who adulates. 

bootlicker

noun
  • A person who behaves in a servile or obsequious manner; a toady 

  • Anyone who is seen as supporting authoritarianism. 

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