overfall vs topple over

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. 

topple over

verb
  • To fall over (to fall from an upright or standing position to a horizontal or prone position). 

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