effect vs motivation

effect

noun
  • Consequence intended; purpose; meaning; general intent; with to. 

  • The result or outcome of a cause. 

  • An illusion produced by technical means (as in "special effect") 

  • Belongings, usually as personal effects. 

  • The state of being binding and enforceable, as in a rule, policy, or law. 

  • A scientific phenomenon, usually named after its discoverer. 

  • Execution; performance; realization; operation. 

  • An alteration, or device for producing an alteration, in sound after it has been produced by an instrument. 

  • Impression left on the mind; sensation produced. 

verb
  • To make or bring about; to implement. 

motivation

noun
  • An incentive or reason for doing something. 

  • Something which motivates. 

  • A research rating that measures how the rational and emotional elements of a commercial affect consumer intention to consider, visit, or buy something. 

  • The action of motivating. 

  • Willingness of action especially in behavior. 

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