ennui vs well-being

ennui

verb
  • To make bored or listless; to weary. 

noun
  • A gripping listlessness or melancholia caused by boredom; depression. 

well-being

noun
  • A state of health, happiness or prosperity. 

How often have the words ennui and well-being occurred in a corpus of books? (source: Google Ngram Viewer )