carrion crow vs jackdaw

carrion crow

noun
  • The common European black crow Corvus corone. 

  • The American black vulture Coragyps atratus. 

jackdaw

noun
  • A European bird (Coloeus monedula) of the crow family, often nesting in church towers and ruins. 

  • A Daurian jackdaw, a closely related Asian bird (Coloeus dauuricus). 

How often have the words carrion crow and jackdaw occurred in a corpus of books? (source: Google Ngram Viewer )