brilliance vs splendidness

brilliance

noun
  • Magnificence; resplendence. 

  • The quality of being exceptionally effulgent (giving off light). 

  • The quality of having extraordinary mental capacity. 

splendidness

noun
  • something that is splendid. 

  • the state or the quality of being splendid. 

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