insensitive vs stonehearted

insensitive

adj
  • Not expressing normal emotional feelings; cold; tactless; undiplomatic 

  • Expressing or feeling little or no concern, care, compassion, or consideration for the feelings, emotions, sentiments, or concerns of other people; inconsiderate or incompassionate 

  • Not expressing normal physical feeling; 

stonehearted

adj
  • Hardhearted; pitiless; unfeeling. 

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