censorship vs encouragement

censorship

noun
  • The use of state or group power to control freedom of expression or press, such as passing laws to prevent media from being published or propagated. 

  • The role of the censor (magistrate) in Ancient Rome. 

encouragement

noun
  • Words or actions that increase someone's confidence 

  • Something that incites, supports, promotes, protects or advances; incentive 

  • The feeling of being encouraged 

  • The act of encouraging 

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