exuberance vs unhappiness

exuberance

noun
  • The quality of being exuberant; cheerful or vigorous enthusiasm; liveliness. 

  • An abundance of wealth. 

  • An overflowing quantity; superfluousness. 

  • An instance of exuberant behaviour. 

unhappiness

noun
  • The feeling of not being happy 

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