pubic region vs pudendum

pubic region

noun
  • The central part of the (notably human) body near the pubes and the pubis, including the genitalia. 

pudendum

noun
  • A person’s genital organ, mons pubis, anus, and buttocks collectively. 

  • A shameful part of something. 

  • An external genital organ in a human; especially a woman’s vulva. 

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