hoi polloi vs peoplekind

hoi polloi

noun
  • The common people; the masses. (Used with or without the definite article.) 

  • The elite. 

peoplekind

noun
  • People as a whole; humanity, humankind; a gender-neutral alternative to "mankind". 

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