booby vs porpoise

booby

noun
  • Any of various large tropical seabirds from the genera Sula and Papasula in the gannet family Sulidae, traditionally considered to be stupid. 

  • A woman’s breast. 

  • A stupid person. 

  • In the game of croquet, a ball that has not passed through the first wicket. 

verb
  • To behave stupidly; to act like a booby. 

  • To install a booby trap on or at (something); to attack (someone) with a booby trap. 

adj
  • Displaying breasts prominently. 

  • Having large breasts. 

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 booby and porpoise occurred in a corpus of books? (source: Google Ngram Viewer )