antibacterial vs antimicrobic

antibacterial

noun

  • A drug having the effect of killing or inhibiting bacteria. 

adj

  • Killing or inhibiting bacteria. 

antimicrobic

noun

  • Any antimicrobial agent 

adj

  • antimicrobial 

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