highborn vs illustrious

highborn

adj
  • Of superior or premium quality; magnificent; expensive. 

  • Of, pertaining to, or befitting people of high social standing. 

illustrious

adj
  • Admired, distinguished, respected, or well-known, especially due to past achievements or noble qualities. 

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