billfold vs carrier bag

billfold

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

carrier bag

noun
  • A bag made of thin polythene or paper, generally used for carrying groceries or other purchased items. 

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