buccal cavity vs yap

buccal cavity

noun
  • The oral cavity, bound by the cheeks of the face, the palate, and the flesh of the mandible, opening onto the mouth and the fauces, and containing the teeth, tongue, gums, and other structures. 

  • The first part of the stomodaeum, lying just within the mouth; its dilator muscles arising on the clypeus, and inserted before the frontal ganglion and its connectives. 

yap

noun
  • The mouth, which produces speech. 

  • The high-pitched bark of a small dog, or similar. 

  • Casual talk; chatter. 

  • A badly behaved child; a brat. 

verb
  • Of a small dog, to bark. 

  • To talk, especially excessively; to chatter. 

  • To rob or steal from (someone). 

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