digress vs mistake

digress

verb
  • To turn aside from the right path; to transgress; to offend. 

  • To step or turn aside; to deviate; to swerve; especially, to turn aside from the main subject of attention, or course of argument, in writing or speaking. 

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. 

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