jewel vs yolk

jewel

noun
  • The clitoris. 

  • A precious or semi-precious stone; gem, gemstone. 

  • A valuable object used for personal ornamentation, especially one made of precious metals and stones; a piece of jewellery. 

  • A bearing for a pivot in a watch, formed of a crystal or precious stone. 

  • Any of various lycaenid butterflies of the genus Hypochrysops. 

  • Anything precious or valuable. 

verb
  • To bejewel; to decorate or bedeck with jewels or gems. 

yolk

noun
  • The grease in a sheep's fleece; lanolin. 

  • The yellow, spherical part of an egg that is surrounded by the white albumen, and serves as nutriment for the growing young. 

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