nard vs scrotum

nard

noun
  • A testicle. 

  • Nardostachys jatamansi, a flowering plant of the valerian family that grows in the Himalayas, used as a perfume, an incense, a sedative, and an herbal medicine. 

  • A fragrant oil from the plant, formerly much prized. 

  • American spikenard (Aralia racemosa), a North American perennial herb with an aromatic root. 

scrotum

noun
  • The sac of skin and muscle that contains the testicles in most mammals. 

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