fluke vs vital

fluke

noun
  • A metal hook on the head of certain staff weapons (such as a bill), made in various forms depending on function, whether used for grappling or to penetrate armour when swung at an opponent. 

  • Waste cotton. 

  • Either of the two lobes of a whale's or similar creature's tail. 

  • A trematode; a parasitic flatworm of the Trematoda class, related to the tapeworm. 

  • A lucky or improbable occurrence, with the implication that the occurrence could not be repeated. 

  • In general, a winglike formation on a central piece. 

  • A flounder. 

  • Any of the triangular blades at the end of an anchor, designed to catch the ground. 

verb
  • To obtain a successful outcome by pure chance. 

  • To fortuitously pot a ball in an unintended way. 

vital

adj
  • Invigorating or life-giving. 

  • Very important. 

  • Containing life; living. 

  • Necessary to continued existence. 

  • Necessary to the continuation of life; being the seat of life; being that on which life depends. 

  • Capable of living; in a state to live; viable. 

  • Relating to the recording of life events. 

  • Relating to, or characteristic of life. 

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