goat antelope vs ibex

goat antelope

noun
  • Any of a group of herbivore mammals, the subfamily Caprinae, that includes domestic sheep and goats. 

ibex

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

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

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