Untermensch vs subhuman

Untermensch

noun
  • An inferior person; a subhuman, especially in a Nazi racial hierarchy. 

subhuman

noun
  • Anything which is less than human. 

adj
  • Less than human; lacking characteristics of a human. 

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