bellicosity vs spleen

bellicosity

noun
  • The characteristic of being bellicose. 

spleen

noun
  • A fit of immoderate laughter or merriment. 

  • In vertebrates, including humans, a ductless vascular gland, located in the left upper abdomen near the stomach, which destroys old red blood cells, removes debris from the bloodstream, acts as a reservoir of blood, and produces lymphocytes. 

verb
  • To remove the spleen, or, by extension, to gore. 

  • To excise or remove. 

  • To annoy or irritate. 

  • To complain; to rail; to vent one's spleen. 

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