scutch vs thresh

scutch

verb
  • To separate the woody fibre from (flax, hemp, etc.) by beating; to swingle. 

noun
  • A bricklayer's small picklike tool with two cutting edges (or prongs) for dressing stone or cutting and trimming bricks. 

  • The woody fibre of flax or hemp; the refuse of scutched flax or hemp. 

  • A tuft or clump of grass. 

  • A wooden implement shaped like a large knife used to separate the valuable fibres of flax or hemp by beating them and scraping from it the woody or coarse portions. 

thresh

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

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

  • To violently toss the limbs about. 

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