pocket money vs subsistence

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. 

subsistence

noun
  • Something (food, water, money, etc.) that is required to stay alive. 

  • Embodiment or personification or hypostasis of an underlying principle or quality. 

  • Real being; existence. 

  • Inherency. 

  • The act of maintaining oneself at a minimum level. 

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