stob vs yark

stob

verb
  • To stab. 

  • To make mats with a stob tool. 

  • To roof with stob-thatch. 

noun
  • A small post for supporting paling. 

  • A wedge in coal-mining. 

  • A stick, twig or peg, especially in roofing or matting. 

yark

verb
  • To crack (a whip). 

  • To hit, strike, especially with a cane or whip. 

  • To draw (stitches etc.) tight. 

  • To make ready; prepare. 

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