equestrian vs hippic

equestrian

adj
  • Of horseback riding or horseback riders. 

  • Of or relating to the ancient Roman class of equites. 

noun
  • Synonym of eques 

  • One who rides a horse. 

hippic

adj
  • Relating to horses or horse-riding. 

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