tellin vs venerid

tellin

noun
  • A marine bivalve mollusc, of the genus Tellina, that burrows in the sand, from where it siphons detritus. 

venerid

noun
  • A short-necked clam of the family Veneridae. 

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