paper money vs pelf

paper money

noun
  • A type of joss paper resembling banknotes burnt to venerate the deceased, ancestor spirits, deities, etc. 

  • Cash in the form of banknotes. 

pelf

noun
  • A contemptible or useless person. 

  • Dust; fluff. 

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