blackguard vs charlatan

blackguard

noun
  • The lowest servant in a household charged with pots, pans, and other kitchen equipment. 

verb
  • To act like a blackguard; to be a scoundrel. 

  • To revile or abuse in scurrilous language. 

charlatan

noun
  • A malicious trickster; a fake person, especially one who deceives for personal profit. 

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