pariah vs unperson

pariah

noun
  • A similarly despised group of people or species of animal. 

  • Synonym of outcast: A person despised and excluded by their family, community, or society, especially a member of the untouchable castes in Indian society. 

unperson

noun
  • A human who has been stripped of rights, identity or humanity. 

verb
  • To strip (a human being) of rights, identity or humanity. 

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