humour vs melancholy

humour

noun
  • 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. 

  • The quality of being amusing, comical, funny. 

  • 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. 

melancholy

noun
  • Black bile, formerly thought to be one of the four "cardinal humours" of animal bodies. 

  • Great sadness or depression, especially of a thoughtful or introspective nature. 

adj
  • Affected with great sadness or depression. 

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