newspeak vs parlance

newspeak

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

parlance

noun
  • A certain way of speaking, of using words; especially that associated with a particular job or interest. 

  • Of a word, the quality of being lexicalized; especially as jargon or slang. 

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