cormorant vs sea raven

cormorant

noun
  • Any of various medium-large black seabirds of the family Phalacrocoracidae which dive into water for fish and other aquatic animals, found throughout the world except for islands in the centre of the Pacific Ocean; specifically, the great cormorant (Phalacrocorax carbo). 

  • A voracious eater; also, a person who, or thing which, is aggressively greedy for wealth, etc. 

adj
  • Voracious; aggressively greedy. 

sea raven

noun
  • Any fish in the family Hemitripteridae. 

  • The cormorant. 

  • An American cottoid fish, Hemitripterus americanus, allied to the sculpins. 

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