man Friday vs running dog

man Friday

noun
  • A native or aborigine, especially one who inhabits an island 

  • A right-hand man 

running dog

noun
  • A lackey; a lapdog; an unprincipled person who helps or flatters other, more powerful and often evil people. 

How often have the words man Friday and running dog occurred in a corpus of books? (source: Google Ngram Viewer )