skimming vs white-collar crime

skimming

noun
  • The sport of skimboarding. 

  • Something skimmed from a surface etc. 

  • A motion or action that skims. 

  • The act of fraudulently copying a magnetic stripe from a magnetic stripe card, such as found on credit cards and bank cards, through the use of a skimmer 

white-collar crime

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

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