reptile vs reptiliform

reptile

adj
  • Creeping; moving on the belly, or by means of small and short legs. 

  • Grovelling; low; vulgar. 

noun
  • A cold-blooded vertebrate of the class Reptilia; an amniote that is neither a synapsid nor a bird; excludes amphibians. 

  • A mean or grovelling person. 

  • A reptile or amphibian. 

reptiliform

adj
  • Resembling or relating to reptiles. 

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