buoyant vs lifeless

buoyant

adj
  • Having buoyancy; able to float. 

  • Lighthearted and lively. 

  • Involving or engaged in much successful trade or activity. 

lifeless

adj
  • inanimate; having no life 

  • dull or lacking vitality 

  • dead; having lost life 

  • uninhabited, or incapable of supporting life 

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