newspeak vs plugging

newspeak

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

plugging

noun
  • The material of which a plug or stopper is made. 

  • An arrangement of plugs. 

  • The act of stopping with a plug. 

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