mistake vs touch up

mistake

noun
  • An error; a blunder. 

  • A pitch which was intended to be pitched in a hard-to-hit location, but instead ends up in an easy-to-hit place. 

verb
  • To understand wrongly, taking one thing or person for another. 

touch up

verb
  • To make slight corrections or adjustments to; to fill in or perfect. 

  • To fondle or to grope someone, usually in an inappropriate way. 

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