porpoise vs rocket

porpoise

verb
  • 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. 

  • 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. 

noun
  • Any small dolphin. 

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

rocket

verb
  • To fly vertically. 

  • To carry something in a rocket. 

  • To accelerate swiftly and powerfully. 

  • To rise or soar rapidly. 

  • To attack something with rockets. 

noun
  • A rocket engine. 

  • A non-guided missile propelled by a rocket engine. 

  • A vehicle propelled by a rocket engine. 

  • An ace (the playing card). 

  • A stupid or crazy person. 

  • Something that shoots high in the air. 

  • A very physically attractive woman. 

  • An angry communication (such as a letter or telegram) to a subordinate. 

  • A blunt lance head used in jousting. 

  • A rocket propelled firework; a skyrocket. 

  • Rocket larkspur (Consolida regalis). 

  • The leaf vegetable Eruca sativa or Eruca vesicaria. 

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