long-eared owl vs scops owl

long-eared owl

noun
  • Asio otus, a species of owl which breeds in Europe, Asia, and North America. Long eared owls are partially migratory, moving south in winter from the northern parts of their range. 

scops owl

noun
  • Any owl of the Old World genus Otus. 

  • A small European migratory owl, Otus scops, that winters in sub-Saharran Africa. 

How often have the words long-eared owl and scops owl occurred in a corpus of books? (source: Google Ngram Viewer )