conch vs cowrie

conch

noun
  • A marine gastropod of the family Strombidae which lives in its own spiral shell. 

  • A musical instrument made from a large spiral seashell, somewhat like a trumpet. 

  • The shell of this sea animal. 

  • Synonym of concher (“machine used to refine the flavour and texture of chocolate”) 

  • The semidome of an apse, or the apse itself. 

verb
  • To refine the flavour and texture of chocolate by warming and grinding, either in a traditional concher, or between rollers. 

  • To play a conch seashell as a musical instrument, by blowing through a hole made close to the origin of the spiral. 

cowrie

noun
  • Any gastropod of the family Cypraeidae; its shell. 

  • A small gastropod (Monetaria moneta, syn. Cypraea moneta) common in the Indian Ocean; its shell. 

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