mistake vs tattletale

mistake

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

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. 

tattletale

verb
  • To act as a tattletale; to tell on; to give away, reveal, or expose. 

adj
  • telltale; giveaway 

noun
  • One who tattles (reports others' wrongdoings), often a child seeking attention. 

  • One who gossips, often for the sake of attention. 

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