Pandion haliaetus vs fish eagle

Pandion haliaetus

fish eagle

noun
  • Any of several species of birds of prey that feed on fish in the genus Haliaeetus (syn. Ichthyophaga). 

  • The osprey (Pandion haliaetus). 

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