brilliance vs flair

brilliance

noun
  • Magnificence; resplendence. 

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

  • The quality of having extraordinary mental capacity. 

flair

noun
  • Distinctive style or elegance. 

  • A natural or innate talent or aptitude. 

verb
  • To add flair. 

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