AC vs galvanism

AC

phrase
  • as charged, as in: guilty as charged, usually a/c. 

name
  • Aceh, an autonomous province of Indonesia. 

  • Acre, a state of Brazil. 

noun
  • Companion of the Order of Australia. 

galvanism

noun
  • The chemical generation of electricity. 

  • The therapeutic use of electricity directly applied to the body. 

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