Japayuki-san vs streetwalker

Japayuki-san

noun
  • A Filipina who travels to Japan to work as an entertainer, with implications of prostitution. 

streetwalker

noun
  • A prostitute who looks for customers on the streets and in other public places. 

How often have the words Japayuki-san and streetwalker occurred in a corpus of books? (source: Google Ngram Viewer )