electricity vs power supply

electricity

noun
  • Electric power/energy as used in homes etc., supplied by power stations or generators. 

  • Originally, a property of amber and certain other nonconducting substances to attract lightweight material when rubbed, or the cause of this property; now understood to be a phenomenon caused by the distribution and movement of charged subatomic particles and their interaction with the electromagnetic field. 

  • The study of electrical phenomena; the branch of science dealing with such phenomena. 

  • A feeling of excitement; a thrill. 

power supply

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

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

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

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