homuncular vs underdeveloped

homuncular

adj
  • Of or pertaining to a homunculus. 

underdeveloped

adj
  • immature and not fully developed 

  • having a low level of economic productivity and technological sophistication 

  • of a film that has had insufficient development before being fixed 

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