equestrian vs equine

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. 

equine

adj
  • Of or relating to a horse or horses. 

  • Of or relating to any member or members of the genus Equus. 

noun
  • Any horse or horse-like animal, especially one of the genus Equus. 

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