furze vs shrubbery

furze

noun
  • A thorny evergreen shrub, with yellow flowers, Ulex gen. et spp., of which Ulex europaeus is particularly common upon the plains and hills of Great Britain and Ireland. 

shrubbery

noun
  • Shrubs collectively. 

  • A planting of shrubs; a wide border to a garden where shrubs are thickly planted; or a similar larger area with a path winding through it. 

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