penitence vs shamelessness

penitence

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

shamelessness

noun
  • An utterance or action which is shameless. 

  • The state or characteristic of being shameless. 

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