mirth vs sorrow

mirth

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

  • That which causes merriment. 

sorrow

verb
  • To feel grief over; to mourn, regret. 

  • To feel or express grief. 

noun
  • (usually in plural) An instance or cause of unhappiness. 

  • unhappiness, woe 

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