lifeless vs unfruitful

lifeless

adj
  • inanimate; having no life 

  • dull or lacking vitality 

  • dead; having lost life 

  • uninhabited, or incapable of supporting life 

unfruitful

adj
  • Not bearing fruit. 

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