disease-free vs unadulterated

disease-free

adj
  • free of disease, not having, carrying, or suffering from any disease. 

unadulterated

adj
  • pure; not mixed or adulterated with anything 

  • utter or out-and-out, especially in the phrase unadulterated truth 

How often have the words disease-free and unadulterated occurred in a corpus of books? (source: Google Ngram Viewer )