mobile vs operant

mobile

noun
  • One who or moves, or who can move (e.g. to travel to a different place). 

  • The internet accessed via mobile devices. 

  • A kinetic sculpture or decorative arrangement made of items hanging so that they can move independently from each other. 

adj
  • Capable of being moved, aroused, or excited; capable of spontaneous movement. 

  • Pertaining to or by agency of mobile phones. 

  • Characterized by an extreme degree of fluidity; moving or flowing with great freedom. 

  • Capable of being moved, especially on wheels. 

  • Easily moved in feeling, purpose, or direction; excitable; changeable; fickle. 

  • Changing in appearance and expression under the influence of the mind. 

operant

noun
  • An operative person or thing. 

  • Any of a class of behaviors that produce consequences by operating (i.e., acting) upon the environment. 

adj
  • That operates to produce an effect. 

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