expiration vs lambda

expiration

noun
  • A cessation, extinction, ending 

  • That which is produced by breathing out, as a sound. 

  • Emission of volatile matter; exhalation. 

  • The last emission of breath; death. 

  • The act of expiring. 

  • The act or process of breathing out, or forcing air from the lungs through the nose or mouth 

lambda

noun
  • The cosmological constant. 

  • The junction of the lambdoid and sagittal sutures of the cranium. 

  • Unit representation of wavelength. 

  • The percentage change in an option value divided by the percentage change in the underlying asset's price. 

  • A lambda expression. 

  • A lambda baryon. 

  • The eleventh letter of the Classical and Modern Greek alphabet, the twelfth of the Old Greek alphabet. 

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