henna vs verdigris

henna

noun
  • A reddish plant substance, prepared from the dried leaves of this plant, used for temporary tattoos and hair coloring. Hair colorings range from bright red to earth brown to near black. 

  • A shrub, Lawsonia inermis, having fragrant reddish flowers 

  • A rich reddish-brown colour. 

adj
  • Of a rich reddish-brown colour. 

verb
  • To dye or tattoo with henna. 

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. 

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