fever vs warmth

fever

noun
  • A state of excitement or anxiety. 

  • A higher than normal body temperature of a person (or, generally, a mammal), usually caused by disease. 

  • A group of stingrays. 

  • Any of various diseases. 

verb
  • To become fevered. 

  • To put into a fever; to affect with fever. 

warmth

noun
  • Fervor, intensity of emotion or expression. 

  • Friendliness, kindness or affection. 

  • A moderate degree of heat; the sensation of being warm. 

  • The effect of using mostly red and yellow hues. 

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