burnished vs darkened

burnished

adj
  • Blazing, bright. 

  • Polished, made shiny by rubbing (especially with a burnisher). 

darkened

adj
  • Made dark or lightproof by the exclusion of light. 

  • Having an absence of light, such as at night-time. 

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