deepen vs shorten

deepen

verb
  • To become deeper 

  • To make deep or deeper 

  • To make more sound or heavy. 

  • To become lower in tone 

  • To make darker or more intense; to darken 

  • To become more intimate. 

  • To make lower in tone 

  • To become darker or more intense 

  • To become more thorough or extensive. 

  • To make more thorough or extensive. 

  • To become more sound or heavy. 

  • To make more intimate. 

  • To make more poignant or affecting; to increase in degree 

shorten

verb
  • To become shorter. 

  • To reduce or diminish in amount, quantity, or extent; to lessen. 

  • To take in the slack of (a rope). 

  • To reduce (sail) by taking it in. 

  • To make shorter; to abbreviate. 

  • To make short or friable, as pastry, with butter, lard, etc. 

  • To make deficient (as to); to deprive (of). 

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