citizenship vs probation

citizenship

noun
  • The status of being a citizen, in its various senses. 

  • The state of being a citizen, in its various senses. 

probation

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

  • A testing period of time 

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