ditching vs jigging

ditching

noun
  • A deliberate crash landing on the sea or other body of water. 

jigging

noun
  • 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. 

  • The act of dancing a jig. 

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