expediency vs overtake

expediency

noun
  • An expedient. 

  • The quality of being fit or suitable to effect some desired end or the purpose intended; suitability for particular circumstance or situation. 

  • Pursuit of the course of action that brings the desired effect even if it is unjust or unprincipled. 

overtake

noun
  • An act of overtaking; an overtaking maneuver. 

verb
  • To become greater than something else 

  • To occur unexpectedly; take by surprise; surprise and overcome; carry away 

  • To pass a slower moving object or entity (on the side closest to oncoming traffic). 

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