overfall vs waterfall

overfall

verb
  • To fall over; to spill from an edge or height. 

  • To fall on or spill over so as to cover (something). 

  • To change or affect so as to pervade (something); to come over 

  • To fall over; to topple. 

noun
  • Part of a garment that hangs so as to cover a lower part. 

  • A turbulent section of a body of water, caused by strong currents passing over submerged ridges. 

waterfall

verb
  • To fall like a waterfall. 

  • To drink (something) from a container by pouring it from a height so as not to touch one's lips to the rim. 

  • Synonym of recycle 

noun
  • A waterfall-like outpouring of liquid, smoke, etc. 

  • A flow of water over the edge of a cliff. 

  • Waterfall model 

  • The action of drinking from a vessel without touching it with the lips, considered more sanitary for a shared vessel. 

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