expire vs run low

expire

verb
  • To bring to a close; to terminate. 

  • To come to an end; to conclude. 

  • To die. 

  • To lapse and become invalid. 

  • To exhale; to breathe out. 

  • To give forth insensibly or gently, as a fluid or vapour; to emit in minute particles. 

run low

verb
  • To near the end of a supply of something; to be nearly running out. 

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