AC vs voltaic

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. 

voltaic

adj
  • producing electricity by chemical action. 

  • of or relating to electricity. 

  • reminiscent of the action of electricity: thrilling, shocking, dramatic. 

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