antibiotic vs bactericidal

antibiotic

adj
  • Of or relating to antibiotics. 

noun
  • Any substance that can destroy or inhibit the growth of bacteria and similar microorganisms, generally transported by the lymphatic system. 

bactericidal

adj
  • Of or pertaining to a bactericide. 

  • That kills bacteria. 

noun
  • A bactericide. 

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