excitation vs motivation

excitation

noun
  • The act of producing excitement (stimulation); also, the excitement produced. 

  • The activity produced in an organ, tissue, or part, such as a nerve cell, as a result of stimulation 

  • The act of exciting or putting in motion; the act of rousing up or awakening. 

  • A transition of a nucleus, atom or molecule to an excited state by the absorption of a quantum of energy; the opposite of relaxation 

motivation

noun
  • The action of motivating. 

  • 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. 

  • Willingness of action especially in behavior. 

  • An incentive or reason for doing something. 

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