copse vs thicket

copse

noun
  • Any thicket of small trees or shrubs, coppiced or not. 

  • A coppice: an area of woodland managed by coppicing (periodic cutting near stump level). 

  • Any woodland or woodlot. 

verb
  • To trim or cut. 

  • To plant and preserve. 

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 copse and thicket occurred in a corpus of books? (source: Google Ngram Viewer )