equivocation vs sophism

equivocation

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

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

sophism

noun
  • Sophistic, fallacious reasoning or argumentation. 

  • A flawed argument, superficially correct in its reasoning, usually designed to deceive. 

  • The school of the sophists in antiquity; their beliefs and method of teaching philosophy and rhetoric. 

  • An intentional fallacy. 

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