sorrowful vs unrepentant

sorrowful

adj
  • exhibiting sorrow; dejected; distraught; sad. 

  • Producing sorrow; causing grief. 

unrepentant

adj
  • Feeling or showing no sorrow or regret for wrongdoing. 

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