activity vs motion

activity

noun
  • Something done as an action or a movement. 

  • The lexical aspect (aktionsart) of verbs or predicates that change over time and have no natural end point. 

  • Something done for pleasure or entertainment, especially one involving movement or an excursion. 

  • The state or quality of being active; activeness. 

  • The number of radioactive decays per unit time. Unit for it: becquerel or curie 

  • The propery of substances to react with other substances 

motion

noun
  • Movement of the mind, desires, or passions; mental act, or impulse to any action; internal activity. 

  • A change from one place to another. 

  • A movement of the bowels; the product of such movement. 

  • A state of progression from one place to another. 

  • from κίνησις (kinesis); any change. Traditionally of four types: generation and corruption, alteration, augmentation and diminution, and change of place. 

  • A formal request, oral or written, made to a judge or court of law to obtain an official court ruling or order for a legal action to be taken by, or on behalf of, the movant. 

  • A change of position with respect to time. 

  • A parliamentary action to propose something. A similar procedure in any official or business meeting. 

  • A piece of moving mechanism, such as on a steam locomotive. 

  • Change of pitch in successive sounds, whether in the same part or in groups of parts. (Conjunct motion is that by single degrees of the scale. Contrary motion is when parts move in opposite directions. Disjunct motion is motion by skips. Oblique motion is when one part is stationary while another moves. Similar or direct motion is when parts move in the same direction.) 

verb
  • To introduce a motion in parliamentary procedure. 

  • To make a proposal; to offer plans. 

  • To gesture indicating a desired movement. 

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