newspeak vs promulgation

newspeak

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

promulgation

noun
  • The act of promulgating or announcing something, especially a proclamation announcing a new law. 

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