boredom vs mirth

boredom

noun
  • An instance or period of being bored; A bored state. 

  • The state of being bored. 

mirth

noun
  • The emotion usually following humour and accompanied by laughter; merriment; jollity; gaiety. 

  • That which causes merriment. 

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