human race vs peoplekind

human race

noun
  • mankind, humanity; humankind; Homo sapiens 

  • Used other than figuratively or idiomatically: see human, race. 

peoplekind

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

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