expiring vs temporal

expiring

adj
  • Ending, terminating, dying. 

temporal

adj
  • Of limited time, transient, passing, not perpetual, as opposed to eternal. 

  • Of or relating to time as distinguished from space. 

  • Relating to or denoting time or tense. 

  • Of or situated in the temples of the head or the sides of the skull behind the orbits. 

  • Of or relating to the material world, as opposed to sacred or clerical. 

  • Lasting for a short time only. 

  • Of or relating to the sequence of time or to a particular time. 

noun
  • Anything temporal or secular; a temporality. 

  • Any of a reptile's scales on the side of the head between the parietal and supralabial scales, and behind the postocular scales. 

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