though vs while

though

conj
  • Despite the fact that; although. 

adv
  • Used to intensify statements or questions; indeed. 

  • Despite that; however. 

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. 

noun
  • an uncertain long period of time 

  • an uncertain short moment 

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

verb
  • To pass (time) idly. 

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

prep
  • Until. 

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