payment vs pocket money

payment

noun
  • The act of paying. 

  • An instance of that act; a sum of money paid in exchange for goods or services, or the transaction that conveys it. 

  • Antonyms: non-payment, nonpayment 

pocket money

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

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

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