glimpse vs look through

glimpse

verb
  • To see or view briefly or incompletely. 

  • To appear by glimpses. 

noun
  • A brief look, glance, or peek. 

  • A sudden flash. 

  • A faint idea; an inkling. 

look through

verb
  • Used other than figuratively or idiomatically: see look, through. 

  • To appear or pretend not to see something or someone who is clearly visible. 

  • To take a view of the contents of; search in, either with the eyes or by hand. 

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