orange roughy vs red drum

orange roughy

noun
  • An edible deep-sea fish, Hoplostethus atlanticus, belonging to the slimehead family (Trachichthyidae). 

red drum

noun
  • a large red edible fish, Sciaenops ocellatus, also called channel bass or redfish. 

How often have the words orange roughy and red drum occurred in a corpus of books? (source: Google Ngram Viewer )