shorten vs widthen

shorten

verb
  • 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 become shorter. 

  • To make shorter; to abbreviate. 

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

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

widthen

verb
  • To increase in width, or increase the width of; make or become wider or broader 

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