electricity vs propellant

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. 

propellant

noun
  • fuel, oxidizer, reaction mass or mixture for one or more engines (especially internal combustion engines or jet engines) that is carried within a vehicle prior to use 

  • the explosive (cordite, gunpowder, etc) found in ammunition cartridges 

  • the compressed gas in a pressurised container (especially an aerosol can) that is used to expel its content 

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