probation vs suppression

probation

noun
  • A period of time when a person occupies a position only conditionally and may easily be removed for poor performance 

  • A type of sentence where convicted criminals are allowed to continue living in the community but will automatically be sent to jail if they violate certain conditions 

  • A testing period of time 

suppression

noun
  • The act or instance of suppressing. 

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

  • The state of being suppressed. 

  • 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 probation and suppression occurred in a corpus of books? (source: Google Ngram Viewer )