fragility vs weediness

fragility

noun
  • Weakness; feebleness. 

  • The condition or quality of being fragile; brittleness; frangibility. 

weediness

noun
  • The quality of being weedy or feeble. 

  • The quality of resembling, or being overgrown with, weeds. 

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