osprey vs sea eagle

osprey

noun
  • A bird of prey (Pandion haliaetus) that feeds on fish and has white underparts and long, narrow wings each ending in four finger-like extensions. 

  • aigrette (ornamental feather) 

sea eagle

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

  • A genus of eagles (genus Haliaeetus). 

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