sanitary vs unstained

sanitary

adj
  • Clean and free from pathogens; hygienic. 

  • Of, or relating to health. 

noun
  • Sanitary towel. 

unstained

adj
  • Pure, pristine, clean, immaculate, unadulterated. 

  • Not dyed or discolored; not marred by any stains, marks, or spotting. 

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