fish eagle vs white-tailed eagle

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). 

white-tailed eagle

noun
  • A sea-eagle with a distinctive white tail; (Haliaeetus albicilla). 

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