humour vs mirth

humour

noun
  • The quality of being amusing, comical, funny. 

  • Any of the fluids in an animal body, especially the four "cardinal humours" of blood, yellow bile, black bile and phlegm that were believed to control the health and mood of the human body. 

  • Either of the two regions of liquid within the eyeball, the aqueous humour and vitreous humour. 

  • A mood, especially a bad mood; a temporary state of mind or disposition brought upon by an event; an abrupt illogical inclination or whim. 

verb
  • To pacify by indulging. 

mirth

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

  • That which causes merriment. 

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