pubic hair vs tomentum

pubic hair

noun
  • a single hair growing in the pubic region 

  • The hair that grows in the pubic region from puberty. 

tomentum

noun
  • A covering of fine, soft hairs; a pubescence. 

  • A mass of filamentous hairs on the leaf of a plant. 

  • A network of fine blood vessels between the pia mater and the cerebral cortex. 

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