ennui vs liveliness

ennui

verb
  • To make bored or listless; to weary. 

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

liveliness

noun
  • The quality of being lively; animation; energy. 

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