antelope vs roe deer

antelope

noun
  • Any of several African mammals of the family Bovidae distinguished by hollow horns, which, unlike deer, they do not shed. 

  • The pronghorn, Antilocapra americana. 

roe deer

noun
  • A small, nimble Eurasian deer with no visible tail, a white rump patch, and a reddish summer coat that turns grey in winter, the male having short three-pointed antlers (Capreolus capreolus and Capreolus pygargus). 

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