scutch vs thrash

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. 

thrash

verb
  • To beat mercilessly. 

  • To defeat utterly. 

  • To extensively test a software system, giving a program various inputs and observing the behavior and outputs that result. 

  • In computer architecture, to cause or undergo poor performance of a virtual memory (or paging) system. 

  • To move about wildly or violently; to flail; to labour. 

  • To thresh. 

noun
  • A beat or blow; the sound of beating. 

  • thrash metal 

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