colt vs wild horse

colt

noun
  • A young male horse. 

  • A short piece of rope once used by petty officers as an instrument of punishment. 

  • A young camel or donkey. 

  • A youthful or inexperienced person; a novice. 

  • A young crane (bird). 

  • A professional cricketer during his first season. 

verb
  • To frisk or frolic like a colt; to act licentiously or wantonly. 

wild horse

noun
  • An untamed horse. 

  • A feral horse. 

  • A member of the species Equus ferus, sometimes excluding the domesticated horse. 

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