backstory vs deceit

backstory

noun
  • A fictitious account of a person's history designed to conceal their actual history and motives. 

  • The previous life and experiences of a person, especially a character in a dramatic work, but also a real-life person. 

  • A prequel. 

deceit

noun
  • An act of deceiving someone. 

  • An act or practice intended to deceive; a trick. 

  • The state of being deceitful or deceptive. 

  • The tort or fraudulent representation of a material fact made with knowledge of its falsity, or recklessly, or without reasonable grounds for believing its truth and with intent to induce reliance on it; the plaintiff justifiably relies on the deception, to his injury. 

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