sophism vs untruth

sophism

noun
  • An intentional fallacy. 

  • 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. 

  • Sophistic, fallacious reasoning or argumentation. 

untruth

noun
  • A lie or falsehood. 

  • The condition of being false; truthlessness. 

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