agitprop vs counter-information

agitprop

noun
  • Political propaganda disseminated through art, drama, literature, etc., especially communist propaganda; (specifically, communism, historical) such propaganda formerly disseminated by the Department for Agitation and Propaganda of the Central Committee of the Communist Party of the Soviet Union. 

  • An instance of such propaganda. 

  • An organization or person engaged in disseminating such propaganda. 

verb
  • To disseminate (something as) political propaganda, especially communist propaganda, through art, drama, literature, etc. 

counter-information

How often have the words agitprop and counter-information occurred in a corpus of books? (source: Google Ngram Viewer )