cruelty vs tenderness

cruelty

noun
  • An indifference to suffering or pleasure in inflicting suffering. 

  • A cruel act. 

tenderness

noun
  • concern for the feelings or welfare of others 

  • pain or discomfort when an affected area is touched 

  • a tendency to express warm, compassionate feelings 

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