cold fish vs compassionate

cold fish

noun
  • A heartless individual; a person lacking empathy and emotion. 

  • A sexual partner who, during sex, lacks vigor or emotional reciprocity. 

compassionate

adj
  • Having, feeling or showing compassion (to or toward someone). 

  • Given to someone as an exception because of a family emergency or a death in their family. 

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