out of gas vs powerful

out of gas

prep
  • Tired; lacking energy or motivation. 

  • Used other than figuratively or idiomatically: see out of, gas.: lacking fuel. 

powerful

adj
  • Having, or capable of exerting power, potency or influence. 

  • Leading to many or important deductions. 

  • Large; capacious; said of veins of ore. 

adv
  • Synonym of very 

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