blunder vs thresh

blunder

verb
  • To move blindly or clumsily. 

  • To make a clumsy or stupid mistake. 

  • To do or treat in a blundering manner; to confuse. 

  • To cause to make a mistake. 

noun
  • A clumsy or embarrassing mistake. 

  • A very bad move, usually caused by some tactical oversight. 

thresh

verb
  • To violently toss the limbs about. 

  • To beat soundly, usually with some tool such as a stick or whip; to drub. 

  • To separate the grain from the straw or husks (chaff) by mechanical beating, with a flail or machinery. 

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