frith vs thicket

frith

noun
  • Brushwood or undergrowth, sometimes in the form of a hedge. 

  • A forest or wood; woodland generally. 

  • Land with mostly undergrowth and few trees; also, land in between forests or woods; pastureland which is not in use. 

  • A hedge, especially one made from brushwood which has been wattled; also, a movable frame made from wattled branches, a hurdle. 

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