electricity vs gravity

electricity

noun
  • A feeling of excitement; a thrill. 

  • 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. 

gravity

noun
  • The state or condition of being grave; seriousness. 

  • The lowness of a note. 

  • Specific gravity. 

  • The state or condition of having weight; weight; heaviness. 

  • Gravitation, the universal force exercised by two bodies onto each other. 

  • The force at the Earth's surface, of the attraction by the Earth's masses, and the centrifugal pseudo-force caused by the Earth's rotation, resulting from gravitation. 

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