dirk vs stob

dirk

verb
  • To stab with a dirk. 

noun
  • A long Scottish dagger with a straight blade. 

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. 

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