employment vs lethargy

employment

noun
  • The act of employing 

  • An activity to which one devotes time 

  • The number or percentage of people at work 

  • The work or occupation for which one is used, and often paid 

  • A use, purpose 

  • The state of being employed 

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. 

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