pilferage vs white-collar crime

pilferage

noun
  • The individual act or recurring practice of stealing items of low value, especially in small quantities, for which the legal term is petty theft. 

white-collar crime

noun
  • Non-violent crime, generally for personal gain and often involving money. 

How often have the words pilferage and white-collar crime occurred in a corpus of books? (source: Google Ngram Viewer )