compassion vs unkindness

compassion

noun
  • Deep awareness of the suffering of another, coupled with the wish to relieve it. 

unkindness

noun
  • The state or quality of being unkind. 

  • An unkind act. 

  • The collective noun for ravens 

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