enthusiastic vs out of gas

enthusiastic

adj
  • With zealous fervor; excited, motivated. 

  • Relating to enthusiasm, or divine possession. 

out of gas

prep
  • Tired; lacking energy or motivation. 

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

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