asleep vs mothballed

asleep

adj
  • In a state of sleep; also, broadly, resting. 

  • Inattentive. 

  • Having a numb or prickling sensation accompanied by a degree of unresponsiveness. 

  • Dead. 

mothballed

adj
  • Kept in good condition for possible future use. 

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