conch vs sea snail

conch

noun
  • The shell of this sea animal. 

  • 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. 

  • 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. 

sea snail

noun
  • Any saltwater snail; a marine gastropod mollusk with a shell (contrasted with sea slug). 

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