canard vs counterknowledge

canard

noun
  • A false or misleading report or story, especially if deliberately so. 

  • A type of aircraft in which the primary horizontal control and stabilization surfaces are in front of the main wing. 

  • Any small winglike structure on a vehicle, usually used for stabilization. 

  • A horizontal control and stabilization surface located in front of the main wing of an aircraft. 

counterknowledge

noun
  • Misinformation packaged to look like fact. 

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