discard vs scan

discard

verb
  • To throw away, to reject. 

  • To make a discard; to throw out a card. 

  • To dismiss from employment, confidence, or favour; to discharge. 

noun
  • A temporary variable used to receive a value of no importance and unable to be read later. 

  • Anything discarded. 

  • A discarded playing card in a card game. 

scan

verb
  • To examine sequentially, carefully, or critically; to scrutinize; to behold closely. 

  • To read with an electronic device. 

  • To look about for; to look over quickly. 

  • To conform to a metrical structure. 

  • To perform lexical analysis; to tokenize. 

  • To inspect, analyse or go over, often to find something. 

  • To read or mark so as to show a specific metre. 

  • To create an image of something with the use of a scanner. 

noun
  • Close investigation. 

  • An instance of scanning. 

  • The result or output of a scanning process. 

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