buccal cavity vs lip

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. 

lip

noun
  • Either of the two fleshy protrusions around the opening of the mouth. 

  • Backtalk; verbal impertinence. 

  • One of the two opposite divisions of a labiate corolla. 

  • The sharp cutting edge on the end of an auger. 

  • A part of the body that resembles a lip, such as the edge of a wound or the labia. 

  • The projecting rim of an open container; a short open spout. 

  • One of the edges of the aperture of a univalve shell. 

  • The edge of a high spot of land. 

  • The distinctive petal of the Orchis family. 

  • Embouchure: the condition or strength of a wind instrumentalist's lips. 

verb
  • To change the sound of (a musical note played on a wind instrument) by moving or tensing the lips. 

  • To form the rim, edge or margin of something. 

  • To simulate speech by moving the lips without making any sound; to mouth. 

  • (of something inanimate) To touch lightly. 

  • To touch or grasp with the lips; to kiss; to lap the lips against (something). 

  • To make a golf ball hit the lip of the cup, without dropping in. 

  • To utter verbally. 

  • To rise or flow up to or over the edge of something. 

  • To wash against a surface, lap. 

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