pin money vs pocket money

pin money

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

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 pin money and pocket money occurred in a corpus of books? (source: Google Ngram Viewer )