blitheless vs unfelicitous

blitheless

adj
  • Without happiness or joy; unjoyful; sorrowful; sad. 

  • Pitiful; miserable; wretched. 

unfelicitous

adj
  • Not felicitous; unhappy, unfortunate. 

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