alexithymic vs dispassionate

alexithymic

adj
  • Lacking in emotion or emotional expression. 

  • Pertaining to or having alexithymia. 

noun
  • A person who has difficulty feeling, processing or understanding emotions 

dispassionate

adj
  • not showing, and not affected by, emotion, bias, or prejudice 

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