princely vs reginal

princely

adj
  • Relating to a prince; regal; royal. 

  • Befitting a prince; grand; lavish or opulent. 

adv
  • In the manner of a royal prince's conduct. 

reginal

adj
  • Of, relating to, or resembling a queen. 

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