forbearance vs unforgiveness

forbearance

noun
  • A refraining from the enforcement of something (as a debt, right, or obligation) that is due. 

  • Patient self-control; restraint and tolerance under provocation. 

unforgiveness

noun
  • Lack of forgiveness. 

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