sepia vs verdigris

sepia

noun
  • A dark, slightly reddish, brown colour. 

  • A sepia-coloured drawing or photograph. 

  • A dark brown pigment made from the secretions of the cuttlefish. 

adj
  • Of a dark reddish-brown colour. 

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 sepia and verdigris occurred in a corpus of books? (source: Google Ngram Viewer )