humour vs relax

humour

verb
  • To pacify by indulging. 

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. 

relax

verb
  • To become more lenient. 

  • To become loose. 

  • To become less severe or tense. 

  • To make something (such as codes and regulations) more lenient. 

  • To calm down. 

  • To relieve (something) from stress. 

  • To make something less severe or tense. 

  • To make something loose. 

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