pleach vs thornbush

pleach

noun
  • A branch of a shrub, tree, etc., used for pleaching; a pleacher. 

  • An act or result of interweaving; specifically, (horticulture) a hedge or lattice created by interweaving the branches of shrubs, trees, etc. 

  • A notch cut into a branch so that it can be bent when pleaching is carried out. 

verb
  • To unite by interweaving, as (horticulture) branches of shrubs, trees, etc., to create a hedge; to interlock, to plash. 

thornbush

noun
  • Any of many thorny or spiny shrubs and bushes. 

  • Hyponyms: bramble, briar 

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