close out vs culminate

close out

verb
  • 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. 

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

culminate

verb
  • To finalize, bring to a conclusion, form the climax of. 

  • To reach a point at which continued progress is not possible. 

  • To reach a climax; to come to a decisive point, especially an end or conclusion. 

  • Of a heavenly body, to be at the highest point, reach its greatest altitude. 

  • To reach the (physical or figurative) summit, highest point, peak etc. 

adj
  • Relating to the culmen 

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