deadline vs prong

deadline

noun
  • A time limit in the form of a date on or before which something must be completed. 

verb
  • To render an item non-mission-capable; to ground an aircraft, etc. 

prong

verb
  • To pierce or poke with, or as if with, a prong. 

noun
  • A thin, pointed, projecting part, as of an antler or a fork or similar tool. A tine. 

  • The penis. 

  • A branch; a fork. 

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