repentance vs sadness

repentance

noun
  • A feeling of regret or remorse for doing wrong or sinning. 

  • The condition of being penitent. 

sadness

noun
  • The state or emotion of being sad. 

  • An event in one's life that causes sadness. 

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