black vulture vs buzzard

black vulture

noun
  • An American vulture species, Coragyps atratus, with black plumage. 

  • A north African and Eurasian vulture species, Aegypius monachus. 

buzzard

noun
  • Any scavenging bird, such as the American black vulture (Coragyps atratus) or the turkey vulture (Cathartes aura). 

  • In North America, a curmudgeonly or cantankerous man; an old person; a mean, greedy person. 

  • Any of several Old World birds of prey of the genus Buteo with broad wings and a broad tail. 

  • Synonym of double bogey 

How often have the words black vulture and buzzard occurred in a corpus of books? (source: Google Ngram Viewer )