black cod vs crevalle

black cod

noun
  • Synonym of sablefish (Anoplopoma fimbria); (the sablefish is not a species of codfish; but is referred to as cod informally) 

crevalle

noun
  • A fish, the pompano (Trachinotus carolinus). 

  • A fish, the cavally or jurel. 

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