kingly vs monarchial

kingly

adj
  • Of or belonging to a king or kings; exercised by a king. 

  • Characteristic of kings, majestic, regal; as befits a king, in the manner of a king. 

adv
  • In a royal manner. 

monarchial

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