drongo vs ibex

drongo

noun
  • Any bird of the family Dicruridae. 

  • A fool, an idiot, a stupid fellow. 

ibex

noun
  • An imaginary creature with serrated horns, somewhat similar to the heraldic antelope. 

  • A type of wild mountain goat of the genus Capra, such as the species Capra ibex. 

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