mistake vs tread on someone's toes

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. 

tread on someone's toes

verb
  • To offend someone. 

  • Used other than figuratively or idiomatically: see tread, toes. 

How often have the words mistake and tread on someone's toes occurred in a corpus of books? (source: Google Ngram Viewer )