close out vs introduce

close out

verb
  • Synonym of close (“to make a sale”) 

  • To terminate; to call the end of. 

  • To terminate a computer program. 

  • To make trades offsetting an existing position, leaving the trader with a neutral position. 

  • Of a wave, to break all at once, instead of progressively along its length. 

  • To exclude by blocking all opportunities to enter or join. 

  • To seal off. 

introduce

verb
  • To cause (someone) to be acquainted (with someone else). 

  • To add (something) to a system, a mixture, or a container. 

  • To bring (something) into practice. 

  • To make (something or someone) known by formal announcement or recommendation. 

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