homunculus vs person of restricted growth

homunculus

noun
  • The nerve map of the human body that exists on the parietal lobe of the human brain. 

  • A miniature man, once imagined by spermists to be present in human sperm. 

person of restricted growth

How often have the words homunculus and person of restricted growth occurred in a corpus of books? (source: Google Ngram Viewer )