illness vs weediness

illness

noun
  • An instance of a disease or poor health. 

  • A state of bad health or disease. 

weediness

noun
  • The quality of being weedy or feeble. 

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

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