forbearance vs unkindness

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. 

unkindness

noun
  • The state or quality of being unkind. 

  • An unkind act. 

  • The collective noun for ravens 

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