colt vs pullus

colt

noun
  • A young crane (bird). 

  • 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 male horse. 

  • A professional cricketer during his first season. 

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

pullus

noun
  • A chick; a young bird in the downy stage. 

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