chicken feed vs pocket money

chicken feed

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

  • Food (usually grain) given to poultry. 

pocket money

noun
  • A small sum of cash, carried on the person, for small, daily expenses. 

  • A small sum of money given to a child, by a parent or guardian. 

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