ennui vs versatility

ennui

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

verb
  • To make bored or listless; to weary. 

versatility

noun
  • The property of being versatile or having many different abilities; flexibility. 

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