conch vs mantle

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. 

mantle

noun
  • The body wall of a mollusc, from which the shell is secreted. 

  • A figurative garment representing authority or status, capable of affording protection. 

  • The layer between the Earth's core and crust. 

  • A penstock for a water wheel. 

  • A mantling. 

  • A gauzy fabric impregnated with metal nitrates, used in some kinds of gas and oil lamps and lanterns, which forms a rigid but fragile mesh of metal oxides when heated during initial use and then produces white light from the heat of the flame below it. (So called because it is hung above the lamp's flame like a mantel.) 

  • The back of a bird together with the folded wings. 

  • The zone of hot gases around a flame. 

  • The cerebral cortex. 

  • The outer wall and casing of a blast furnace, above the hearth. 

  • Anything that covers or conceals something else; a cloak. 

  • A piece of clothing somewhat like an open robe or cloak, especially that worn by Orthodox bishops. (Compare mantum.) 

  • A fireplace shelf; Alternative spelling of mantel 

verb
  • To climb over or onto something. 

  • To become covered or concealed. 

  • To spread like a mantle (especially of blood in the face and cheeks when a person flushes). 

  • To cover or conceal (something); to cloak; to disguise. 

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