mishandle vs overestimate

mishandle

verb
  • To deal with a situation incorrectly or ineffectively; to make a mistake in handling a situation. 

  • To manipulate something roughly, causing physical damage. 

noun
  • Improper, wrong, or bad usage or treatment; abuse. 

  • Rough manipulation which causes physical damage. 

  • Ineffective or incorrect deal. 

overestimate

verb
  • To judge or calculate too highly. 

noun
  • An estimate that is too high. 

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