ennui vs entertainment

ennui

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

verb
  • To make bored or listless; to weary. 

entertainment

noun
  • An activity designed to give pleasure, enjoyment, diversion, amusement, or relaxation to an audience, no matter whether the audience participates passively as in watching opera or a movie, or actively as in games. 

  • A show put on for the enjoyment or amusement of others. 

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