mistake vs wally

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. 

wally

noun
  • A fool. 

  • A large pickled gherkin or cucumber. 

adj
  • unusually pale; misaligned, sideways-looking, affected by strabismus. 

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