pleach vs thicket

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. 

thicket

noun
  • A dense, but generally small, growth of shrubs, bushes or small trees; a copse. 

  • A dense aggregation of other things, concrete or abstract. 

  • The collection of many small linked files created when a document is saved in HTML format by some word processors and web site creation software. 

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