fluke vs incident

fluke

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

  • 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. 

  • 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. 

incident

noun
  • An event or occurrence. 

  • An event that causes or may cause an interruption or a crisis, such as a workplace illness or a software error. 

  • A (relatively minor) event that is incidental to, or related to others. 

adj
  • Dependent upon, or appertaining to, another thing, called the principal. 

  • Liable to happen; apt to occur; befalling; hence, naturally happening or appertaining. 

  • Arising as the result of an event, inherent. 

  • Coming or happening accidentally; not in the usual course of things; not in connection with the main design; not according to expectation; casual; fortuitous. 

  • Falling on or striking a surface. 

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