equine vs horseling

equine

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

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

  • Of or relating to a horse or horses. 

horseling

noun
  • A young or little horse; foal; pony. 

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