cock-a-doodle-doo vs common raven

cock-a-doodle-doo

noun
  • The cry of the rooster. 

intj
  • Imitative of the cry of the rooster. 

common raven

noun
  • A large all-black passerine bird in the crow family, Corvus corax. 

  • A dark-colored South Asian swallowtail butterfly, Papilio castor 

How often have the words cock-a-doodle-doo and common raven occurred in a corpus of books? (source: Google Ngram Viewer )