unwind vs waver

unwind

verb
  • To be or become unwound; to be capable of being unwound or untwisted. 

  • To undo something. 

  • To relax; to chill out; to rest and become relieved of stress 

  • To close out a position, especially a complicated position. 

  • To analyse (a call stack) so as to generate a stack trace etc. 

  • To separate (something that is wound up) 

noun
  • Any mechanism or operation that unwinds something. 

waver

verb
  • To be indecisive between choices; to feel or show doubt or indecision; to vacillate. 

  • To sway back and forth; to totter or reel. 

  • To fluctuate or vary, as commodity prices or a poorly sustained musical pitch. 

  • To shake or tremble, as the hands or voice. 

  • To falter; become unsteady; begin to fail or give way. 

  • To flicker, glimmer, quiver, as a weak light. 

noun
  • Someone who specializes in waving (hair treatment). 

  • Someone who waves, enjoys waving, etc. 

  • An act of wavering, vacillating, etc. 

  • A tool that accomplishes hair waving. 

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