allocation vs pin money

allocation

noun
  • That which is allocated; allowance, entitlement. 

  • Restriction of an embryonic cell and its clonal descendents to a particular cell type or body region 

  • The process or procedure for allocating things, especially money or other resources. 

pin money

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

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