precious vs worth one's weight in gold

precious

adj
  • Of high value or worth. 

  • Regarded with love or tenderness. 

  • Contrived to be cute or charming. 

  • Treated with too much reverence. 

  • Thorough; utter. 

  • Blasted; damned. 

adv
  • Very; an intensifier. 

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

worth one's weight in gold

adj
  • Very valuable. 

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