because vs while

because

conj
  • As is known, inferred, or determined from the fact that. 

  • By or for the cause that; on this account that; for the reason that. 

prep
  • On account of, because of. 

adv
  • On account (of), for sake (of). 

  • Used alone to refuse to provide a full answer a question begun with "why", usually taken as an anapodoton of the elided full phrase "Because I said so". 

while

conj
  • Although. 

  • As long as. 

  • Until. 

  • During the same time that. 

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

verb
  • To pass (time) idly. 

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

prep
  • Until. 

noun
  • an uncertain long period of time 

  • an uncertain short moment 

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

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