time lag vs while

time lag

noun
  • A period of time between one event and another; a delay. 

while

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

  • an uncertain long period of time 

  • an uncertain short moment 

verb
  • To pass (time) idly. 

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

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 time lag and while occurred in a corpus of books? (source: Google Ngram Viewer )