maxilla vs rostrum

maxilla

noun
  • Either of the two bones that lie with one on each side of the upper jaw lateral to the premaxilla and that in higher vertebrates bear most of the teeth. 

  • An upper jaw especially of humans and other mammals in which the bony elements are closely fused. 

  • One of the first or second pair of mouthparts posterior to the mandibles in many arthropods that are used for tasting and manipulating food. 

rostrum

noun
  • The oral or nasal region of a human used for anatomical location (i.e. rostral) 

  • A dais, pulpit, or similar platform for a speaker, conductor, or other performer. 

  • A platform for a film or television camera. 

  • The projecting prow of a rowed warship, such as a trireme. 

  • The beak-shaped projection on the head of insects such as weevils. 

  • The snout of a dolphin. 

  • The beak. 

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