poontang vs pubic region

poontang

noun
  • Female genitalia; the vulva or vagina. 

  • Sexual intercourse with a woman. 

pubic region

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

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