amusement vs ennui

amusement

noun
  • Entertainment. 

  • An activity that is entertaining or amusing, such as dancing, gunning, or fishing. 

ennui

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

verb
  • To make bored or listless; to weary. 

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