judder vs succussion

judder

noun
  • A spasmodic shaking. 

  • Jerky playback caused by converting between frame rates; telecine judder 

verb
  • To move with a stop-start motion, as if experiencing a strong resistance or when decelerating brusquely. 

  • To spasm or shake violently. 

succussion

noun
  • A shaking of the body to ascertain whether there is liquid in the thorax. 

  • The preparation of a diluted substance in homeopathy by vigorously shaking it against an elastic body. 

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