barn owl vs long-eared owl

barn owl

noun
  • An owl of the species Tyto alba, often having a white face and commonly found in barns and other farm buildings. 

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. 

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