kindness vs unfriendliness

kindness

noun
  • The state of being kind. 

  • An instance of kind or charitable behaviour. 

unfriendliness

noun
  • The state of being unfriendly. 

  • An unfriendly act, unfriendly acts / actions. 

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