inexpressive vs lifeless

inexpressive

adj
  • Lacking expression or emotion. 

lifeless

adj
  • dull or lacking vitality 

  • inanimate; having no life 

  • dead; having lost life 

  • uninhabited, or incapable of supporting life 

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