rose fish vs slimehead

rose fish

noun
  • A large marine food fish, Sebastes norvegicus, that lives off the North Atlantic coasts of Europe and North America. 

slimehead

noun
  • Any of the long-lived deep-sea fish forming the family Trachichthyidae. 

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