pubes vs tomentum

pubes

noun
  • The pubic hair. 

  • The pubic region. 

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 pubes and tomentum occurred in a corpus of books? (source: Google Ngram Viewer )