dropping vs jigging

dropping

noun
  • The act of something that drops or falls. 

  • Something dropped; a droplet. 

  • A piece of animal excrement; dung. 

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. 

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