equivocation vs fallacy

equivocation

noun
  • The use of expressions susceptible of a double signification, possibly intentionally and with the aim of misleading. 

  • A logical fallacy resulting from the use of multiple meanings of a single expression. 

fallacy

noun
  • Deceptive or false appearance; that which misleads the eye or the mind. 

  • An argument, or apparent argument, which professes to be decisive of the matter at issue, while in reality it is not; a specious argument. 

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