filthy vs sanitary

filthy

verb
  • To make very dirty; to saturate something with dirt. 

  • To cover in filth. 

adj
  • Covered with filth; very dirty. 

  • Obscene or offensive. 

  • Very unpleasant or disagreeable. 

sanitary

noun
  • Sanitary towel. 

adj
  • Clean and free from pathogens; hygienic. 

  • Of, or relating to health. 

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