lethargy vs resilience

lethargy

noun
  • A condition characterized by extreme fatigue or drowsiness, deep unresponsiveness, or prolonged sleep patterns. 

  • A state of extreme torpor or apathy, especially with lack of emotion, energy or enthusiasm; (loosely) sluggishness, laziness. 

resilience

noun
  • The capacity to resist destruction or defeat, especially when under extreme pressure. 

  • The mental ability to recover quickly from depression, illness or misfortune. 

  • The physical property of material that can resume its shape after being stretched or deformed; elasticity. 

  • The positive capacity of an organizational system or company to adapt and return to equilibrium after a crisis, failure or any kind of disruption, including: an outage, natural disasters, man-made disasters, terrorism, or similar (particularly IT systems, archives). 

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