conscience vs penitence

conscience

noun
  • A personification of the moral sense of right and wrong, usually in the form of a person, a being or merely a voice that gives moral lessons and advices. 

  • The moral sense of right and wrong, chiefly as it affects a person’s own behaviour and forms their attitude to their past actions. 

penitence

noun
  • The condition of being penitent; a feeling of regret or remorse for doing wrong or sinning. 

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