dysphemistic vs newspeak

dysphemistic

adj
  • Of, pertaining to, or being a dysphemism. 

newspeak

noun
  • Use of ambiguous, misleading, or euphemistic words in order to deceive the listener, especially by politicians and officials. 

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