scutch vs scutching sword

scutch

noun
  • 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. 

  • 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. 

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

scutching sword

noun
  • A beating instrument for scutching flax by hand. 

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