copse vs scrub up

copse

verb
  • To trim or cut. 

  • To plant and preserve. 

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

  • Any woodland or woodlot. 

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

scrub up

verb
  • To clean or wash by scrubbing. 

  • To dress up. 

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