precious vs worth a king's ransom

precious

adj
  • Regarded with love or tenderness. 

  • Contrived to be cute or charming. 

  • Treated with too much reverence. 

  • Thorough; utter. 

  • Blasted; damned. 

  • Of high value or worth. 

noun
  • Someone (or something) who is loved; a darling. 

adv
  • Very; an intensifier. 

worth a king's ransom

How often have the words precious and worth a king's ransom occurred in a corpus of books? (source: Google Ngram Viewer )