probation vs subjection

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 

subjection

noun
  • The state of being subjected. 

  • The act of bringing something under the control of something else. 

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