jigging vs mitching

jigging

noun
  • The act of dancing a jig. 

  • The act of using a jig; the act of separating ore with a jigger, or wire-bottomed sieve, which is moved up and down in water. 

mitching

noun
  • Pilfering; skulking. 

  • Playing truant. 

  • A pretense of poverty. 

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