ardent vs impassionate

ardent

adj
  • Full of ardor; expressing passion, spirit, or enthusiasm. 

  • Providing light or heat. 

impassionate

adj
  • filled with passion; impassioned 

  • Lacking passion; dispassionate 

verb
  • to affect powerfully; to arouse the passions of 

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