streetwalking vs whoring

streetwalking

noun
  • The trade of a streetwalker; prostitution that is not tied to a particular brothel or establishment. 

whoring

noun
  • Synonym of prostitution, having sex for money; (figurative) disgracing oneself for money; having promiscuous sex. 

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