Japayuki-san vs alley cat

Japayuki-san

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

alley cat

noun
  • A slut, a sexually promiscuous woman or prostitute. 

  • An urban feral cat. 

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