duplicity vs fraud

duplicity

noun
  • Intentional deceptiveness; double-dealing. 

fraud

noun
  • The assumption of a false identity to such deceptive end. 

  • Any act of deception carried out for the purpose of unfair, undeserved and/or unlawful gain. 

  • A person who performs any such trick. 

  • The crime of stealing or otherwise illegally obtaining money by use of deception tactics. 

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