conch vs crust

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. 

crust

noun
  • The shell of crabs, lobsters, etc. 

  • An outer layer composed of pastry 

  • The top or bottom slice of a loaf of bread; The end piece of a loaf; The heel. 

  • The outermost layer of any terrestrial planet. 

  • Nerve, gall. 

  • The outermost layer of the lithosphere of the Earth. 

  • The external, hardened layer of certain foodstuffs, including most types of bread, fried meat, etc. 

  • A living. 

  • The bread-like base of a pizza. 

  • A more solid, dense or hard layer on a surface or boundary. 

verb
  • To cover with a crust. 

  • To form a crust. 

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