birdfeed vs groat

birdfeed

noun
  • Food intended for birds, often a mixture of various seeds. 

groat

noun
  • Hulled grain, chiefly hulled oats. 

  • A historical English silver coin worth four English pennies, still minted as one of the set of Maundy coins. 

  • A proverbial small sum; a whit or jot. 

  • Any of various old coins of England and Scotland. 

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