pittance vs pocket money

pittance

noun
  • A small amount. 

  • A meagre allowance of money or wages. 

  • A small allowance of food and drink; a scanty meal. 

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