bivalve vs scut

bivalve

noun
  • A pericarp in which the seed case opens or splits into two parts or valves. 

  • Any mollusc belonging to the taxonomic class Bivalvia, characterized by a shell consisting of two hinged sections, such as a scallop, clam, mussel or oyster. 

scut

noun
  • The buttocks or rump; also, the female pudenda, the vulva. 

  • A short, erect tail, as of a hare, rabbit, or deer. 

  • Distasteful work; drudgery 

  • Some menial procedure left for a doctor or medical student to complete, sometimes for training purposes. 

  • A contemptible person. 

verb
  • To scamper off. 

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