cloudiness vs effulgence

cloudiness

noun
  • The property of being murky (e.g. liquid, style). 

  • The state of being cloudy (e.g. weather). 

  • The property of being obscure (e.g. information). 

effulgence

noun
  • A state of being bright and radiant, splendor, brilliance. 

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