nicking vs pilferage

nicking

noun
  • A small cut or nick. 

  • The cutting made by the hewer at the side of the face. 

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. 

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