purism vs untruth

purism

noun
  • An insistence on pure or unmixed forms. 

  • An example of purist language etc. 

  • The desire to use words and forms derived from what is considered the native element in a given language instead of elements considered borrowed or foreign. 

  • An insistence on the traditionally correct way of doing things. 

untruth

noun
  • The condition of being false; truthlessness. 

  • A lie or falsehood. 

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