coil vs power supply

coil

noun
  • A coil of electrically conductive wire through which electricity can flow. 

  • Any intrauterine device (Abbreviation: IUD)—the first IUDs were coil-shaped. 

  • Entanglement; perplexity. 

  • A noise, tumult, bustle, or turmoil. 

  • Something wound in the form of a helix or spiral. 

  • A cylinder of clay. 

verb
  • To build a pot (etc) with clay coils. 

  • To wind cylindrically or spirally. 

  • To wind or reel e.g. a wire or rope into regular rings, often around a centerpiece. 

  • To wind into loops (roughly) around a common center. 

power supply

noun
  • That part of a piece of electronic apparatus that provides appropriate voltages for the rest of the electronics from the connected AC source. 

  • A source of power such as the mains or a generator. 

  • Used other than figuratively or idiomatically: see power, supply. 

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