birdie vs pullus

birdie

noun
  • A (little) bird; a birdling; a child's term for a bird. 

  • An electromagnetic signal generated from within an electronic device. 

  • A certain rude gesture in some countries, formed with the middle finger. 

  • A shuttlecock. 

  • A man's penis. 

  • The completion of a hole one stroke below par. 

  • Aw, that's a cute little birdie. Is it a budgie? 

  • A certain rude gesture in some countries, formed with the middle and index fingers. 

verb
  • To score a birdie at (a hole). 

  • To score a birdie. 

pullus

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

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