gunnel vs mulloway

gunnel

noun
  • A small eel-shaped marine fish of the family Pholidae, especially Pholis gunnellus. 

mulloway

noun
  • Any of the species Argyrosomus japonicus of large fish, found along the eastern coast of Africa and the coasts of Australia, prized for sport. 

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