sea eagle vs western osprey

sea eagle

noun
  • A genus of eagles (genus Haliaeetus). 

  • An eagle with a distinctive white tail; specifically, the white-tailed eagle (Haliaeetus albicilla). 

western osprey

noun
  • A fish-eating bird of prey of the species Pandion haliaetus. 

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