piff vs rustle

piff

verb
  • To throw something vigorously. 

intj
  • An exclamation of annoyance or contempt; pish; pshaw. 

adj
  • good or attractive. 

noun
  • Piffle; nonsense; rubbish. 

rustle

verb
  • To move (something) with a soft crackling sound. 

  • To make or obtain in a lively, energetic way. 

  • To steal (cattle or other livestock). 

noun
  • A soft crackling sound similar to the movement of dry leaves. 

  • A movement producing such a sound. 

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