aid vs while

aid

verb
  • To provide support to; to further the progress of; to help; to assist. 

  • To climb with the use of aids such as pitons. 

noun
  • Help; assistance; succor, relief. 

  • An historical subsidy granted to the crown by Parliament for an extraordinary purpose, such as a war effort. 

  • A helper; an assistant. 

  • An exchequer loan. 

  • Something which helps; a material source of help. 

  • A pecuniary tribute paid by a vassal to his feudal lord on special occasions. 

  • The rider's use of hands, legs, voice, etc. to control the horse. 

while

verb
  • To occupy or entertain (someone) in order to let time pass. 

  • To pass (time) idly. 

noun
  • an uncertain long period of time 

  • an uncertain short moment 

  • An uncertain duration of time, a period of time. 

prep
  • Until. 

conj
  • As long as. 

  • Until. 

  • During the same time that. 

  • Used to denote an individual experiencing racial profiling when performing a seemingly benign activity. 

  • Although. 

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