chicken feed vs pin money

chicken feed

noun
  • A very small or insignificant quantity, especially of money. 

  • Food (usually grain) given to poultry. 

pin money

noun
  • An allowance of money given by a man to his wife or to other dependents for their personal, discretionary use. 

How often have the words chicken feed and pin money occurred in a corpus of books? (source: Google Ngram Viewer )