sluggishness vs vitality

sluggishness

noun
  • The state of economic decline, inactivity, slow or subnormal growth. 

  • The property of being sluggish, unable or unwilling to act quickly. 

vitality

noun
  • Energy or vigour. 

  • The capacity to live and develop. 

  • That which distinguishes living from nonliving things; life, animateness. 

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