screech owl vs western barn owl

screech owl

noun
  • A common barn owl, of species Tyto alba, found almost worldwide. 

  • The mistle thrush (Turdus viscivorus). 

  • Any New World owl of genus Megascops. 

western barn owl

noun
  • A barn owl of the subspecies Tyto alba alba, endemic to western Eurasia and most of Africa. 

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