colt vs yearling

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. 

yearling

noun
  • A racehorse that is considered to be one year old until a subsequent January 1st. 

  • A sophomore at West Point military academy. 

  • An animal that is between one and two years old; one that is in its second year (but not yet two full years old). 

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