overfall vs relax

overfall

verb
  • 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 spill from an edge or height. 

  • 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. 

relax

verb
  • To make something loose. 

  • To become loose. 

  • To become less severe or tense. 

  • To make something (such as codes and regulations) more lenient. 

  • To calm down. 

  • To relieve (something) from stress. 

  • To make something less severe or tense. 

  • To become more lenient. 

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