ennui vs uneasiness

ennui

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

verb
  • To make bored or listless; to weary. 

uneasiness

noun
  • The state of being uneasy, nervous or restless. 

  • An anxious state of mind; anxiety. 

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