niceness vs spleen

niceness

noun
  • A value determining how much processor time to concede to a running process. (See also nice (verb), renice.) 

  • Effeminacy; indulgence in soft living or luxuriousness. 

  • Fastidiousness; fine sensitivity. 

  • Pleasantness, especially of behaviour or personality; agreeableness. 

spleen

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. 

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. 

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