kabeljou vs mulloway

kabeljou

noun
  • A type of fish from southern Africa, Argyrosomus coronus. 

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 kabeljou and mulloway occurred in a corpus of books? (source: Google Ngram Viewer )