black whale vs grampus

black whale

noun
  • North Pacific right whale (Eubalaena japonica) 

  • a sperm whale (Physeter catodon, syn. Physeter macrocephalus (family Physeteridae)) 

  • North Atlantic right whale (Eubalaena glacialis) 

grampus

noun
  • The killer whale, Orcinus orca. 

  • The hellbender salamander, Cryptobranchus alleganiensis. 

  • Risso's dolphin, Grampus griseus, with a blunt nose. 

  • giant whip scorpion (Mastigoproctus giganteus) 

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