harshen vs untidy

harshen

verb
  • To make, or to become harsh; render hard and rough. 

  • To render peevish, morose, or austere. 

untidy

verb
  • To make untidy, to make a mess 

adj
  • Sloppy. 

  • Disorganized. 

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