stepper vs stepping motor

stepper

noun
  • A kind of electric motor (a stepper motor) that advances in steps rather than smoothly. 

  • A device used in the manufacture of microcircuits to apply a photolithographic image repeatedly, at regular intervals (by imaging, moving a step and repeating). 

  • A person or animal that steps, especially energetically or high. 

  • A dancer. 

  • A type of exercise machine. 

  • Anything that moves or advances in steps. 

  • A shoe, especially a fashionable or attractive shoe, or one used for step-dancing. 

  • A dancer in a step show. 

stepping motor

noun
  • An electromagnetic actuator that converts digital pulses of input into analog rotary motion, the degree of rotation being proportional to the number of pulses received. 

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