peruse vs read through

peruse

verb
  • To read completely. 

  • To look over casually; to skim. 

  • To examine or consider with care. 

  • To go from place to place; to wander. 

noun
  • An examination or perusal; an instance of perusing. 

read through

verb
  • To thoroughly read something to check or proofread it 

  • To read and obey a signal that is beyond the applicable one (often mistakenly) 

  • To read a script out loud casually with other actors but without blocking 

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