billfold vs purse

billfold

noun
  • A small, folding sleeve or case designed to hold paper currency, as well as credit cards, pictures, etc. 

purse

noun
  • A small bag for carrying money. 

  • A specific sum of money in certain countries: formerly 500 piastres in Turkey or 50 tomans in Persia. 

  • A quantity of money given for a particular purpose. 

  • A handbag (small bag usually used by women for carrying various small personal items) 

verb
  • To press (one's lips) in and together so that they protrude. 

  • To draw up or contract into folds or wrinkles; to pucker; to knit. 

  • To put into a purse. 

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