breast vs porpoise

breast

noun
  • The ventral portion of an animal's thorax. 

  • Either of the two organs on the front of a female human's chest, which contain the mammary glands; also the analogous organs in males. 

  • The figurative seat of the emotions, feelings etc.; one's heart or innermost thoughts. 

  • A section of clothing covering the breast area. 

  • The front or forward part of anything. 

  • The face of a coal working. 

  • The chest, or front of the human thorax. 

  • A choice cut of poultry, especially chicken or turkey, taken from the bird’s breast; also a cut of meat from other animals, breast of mutton, veal, pork. 

  • The front of a furnace. 

  • The breaststroke. 

verb
  • To push against with the breast; to meet full on, oppose, face. 

  • To debreast. 

  • To reach the top (of a hill). 

porpoise

noun
  • A small cetacean of the family Phocoenidae, related to dolphins and whales. 

  • Any small dolphin. 

verb
  • Said of an air-breathing aquatic animal such as a porpoise or penguin: To repeatedly jump out of the water to take a breath and dive back in a continuous motion. 

  • Said of an aircraft: to make a series of plunges when taking off or landing; or of a watercraft: to successively plunge up and down in the water. 

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