censorship vs suppression

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. 

suppression

noun
  • The state of being suppressed. 

  • The act or instance of suppressing. 

  • A process in which a person consciously excludes anxiety-producing thoughts, feelings, or memories. 

  • The entirety of acts aimed at stopping or preventing the enemy to execute such unwanted activities like firing, regrouping, observation or others. 

  • A subconscious adaptation by a person's brain to eliminate the symptoms of disorders of binocular vision such as strabismus, convergence insufficiency and aniseikonia. 

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