Polish vs mandible

Polish

noun
  • A breed of chickens with a large crest of feathers. 

  • The language spoken in Poland. 

adj
  • Of, from or native to Poland, or relating to the Polish language. 

mandible

noun
  • Any of various invertebrate mouthparts serving to hold or bite food materials. 

  • One of the anterior pair of mouthparts of an arthropod, designed for holding and cutting food. 

  • The jaw or a jawbone, especially the lower jawbone in mammals and fishes. 

  • Either of the upper and lower segments of a bird's beak. 

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