live wire vs powerhouse

live wire

noun
  • An especially energetic, alert, or vivacious person. 

  • An electrical wire through which there is a flow of electrical current. 

powerhouse

noun
  • Any source of power, energy or strength; a source of influence or inspiration 

  • A very good hand of cards, likely to win. 

  • A power station; the building housing a power station 

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