verdigris vs willow

verdigris

noun
  • The colour of this patina or material. 

  • A blue-green patina or rust that forms on copper-containing metals. 

verb
  • To cover, or coat, with verdigris. 

willow

noun
  • A rotating spiked drum used to open and clean cotton heads. 

  • Any of various deciduous trees or shrubs in the genus Salix, in the willow family Salicaceae, found primarily on moist soils in cooler zones in the northern hemisphere. 

  • The wood of these trees. 

  • The baseball bat. 

  • A cricket bat. 

verb
  • To form a shape or move in a way similar to the long, slender branches of a willow. 

  • To open and cleanse (cotton, flax, wool, etc.) by means of a willow. 

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