purlieu vs slub

purlieu

noun
  • The ground on the edges of a forest, especially when partly subject to the same forest laws concerning game hunting etc. 

  • The outskirts of any place; an adjacent district; the environs or neighborhood. 

slub

verb
  • To draw and twist fibers in order to prepare them for spinning. 

noun
  • Fabric fiber produced by slubbing. 

  • A small thickened portion or knot found on linen yarn, caused by defects. 

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