brevity vs diffuseness

brevity

noun
  • The quality of being brief in duration. 

  • A short piece of writing. 

  • Succinctness; conciseness. 

diffuseness

noun
  • The state or quality of being diffuse. 

  • The result or product of being diffuse. 

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