blue mussel vs clam

blue mussel

noun
  • A medium-sized edible mussel, Mytilus edulis, found on the North Atlantic coast of North America, Europe, and in other temperate and polar waters around the world. 

clam

noun
  • A bivalve mollusk of many kinds, especially those that are edible; for example soft-shell clams (Mya arenaria), hard clams (Mercenaria mercenaria), sea clams or hen clam (Spisula solidissima), and other species. The name is said to have been given originally to the Tridacna gigas, a huge East Indian bivalve. 

  • A kind of vise, usually of wood. 

  • One who clams up; a taciturn person, one who refuses to speak. 

  • clamminess; moisture 

  • A vagina. 

  • Strong pincers or forceps. 

  • A dollar. 

  • A crash or clangor made by ringing all the bells of a chime at once. 

  • A Scientologist. 

  • In musicians' parlance, a wrong or misplaced note. 

verb
  • To dig for clams. 

  • To produce, in bellringing, a clam or clangor; to cause to clang. 

  • To be moist or glutinous; to stick; to adhere. 

  • To clog, as with glutinous or viscous matter. 

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