slightness vs weediness

slightness

noun
  • The property of being slight, smallness, petiteness 

weediness

noun
  • The quality of being weedy or feeble. 

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

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