impairment vs mistake

impairment

noun
  • an inefficient part or factor. 

  • A deterioration or weakening 

  • The result of being impaired 

  • A downward revaluation, a write-down. 

  • A disability or handicap 

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. 

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