antimicrobial vs germicidal

antimicrobial

adj
  • preventing or counteracting the pathogenic action of microbes 

  • tending to destroy or capable of destroying microbes 

  • inhibiting the growth of microbes 

noun
  • an agent that destroys microbes, inhibits their growth, or prevents or counteracts their pathogenic action 

germicidal

adj
  • that kills pathogenic organisms; disinfectant 

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