aurochs vs urus

aurochs

noun
  • The European bison (Bison bonasus, or Europæus). 

  • An extinct European mammal, Bos primigenius, the ancestor of domestic cattle. 

urus

noun
  • The aurochs. 

  • Synonym of jatra (“annual village festival in India”) 

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