cognate vs incident

cognate

noun
  • One of a number of things allied in origin or nature. 

  • A word either descended from the same base word of the same ancestor language as the given word, or strongly believed to be a regular reflex of the same reconstructed root of proto-language as the given word. 

adj
  • Allied by blood; kindred by birth; specifically (law) related on the mother's side. 

  • Of the same or a similar nature; of the same family; proceeding from the same stock or root. 

  • Descended from the same source lexemes (same etymons) of an ancestor language. 

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 cognate and incident occurred in a corpus of books? (source: Google Ngram Viewer )