pawl vs ratch

pawl

noun
  • A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction. 

  • A similar device to prevent motion in other mechanisms besides ratchets. 

verb
  • To stop with a pawl. 

ratch

noun
  • A ratchet wheel. 

  • A white mark on a horse's face. 

verb
  • To sail by tacks. 

  • To stretch. 

  • To streak. 

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