diffuseness vs logorrhea

diffuseness

noun
  • The state or quality of being diffuse. 

  • The result or product of being diffuse. 

logorrhea

noun
  • Excessive and often uncontrollable speaking due to a mental disorder. 

  • Excessive talkativeness. 

  • Excessive use of words in writing; prolixity. 

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