gingernut vs henna

gingernut

noun
  • A redhead; a ginger-haired person. 

  • A hard biscuit, flavoured with powdered ginger, often dunked in tea. 

henna

noun
  • A rich reddish-brown colour. 

  • 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 

verb
  • To dye or tattoo with henna. 

adj
  • Of a rich reddish-brown colour. 

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