infirm vs potent

infirm

adj
  • Weak or ill, not in good health. 

  • Irresolute; weak of mind or will. 

  • Frail; unstable; insecure. 

verb
  • To contradict, to provide proof that something is not. 

potent

adj
  • Possessing strength. 

  • Able to procreate. 

  • Very powerful or effective. 

  • Having a sharp or offensive taste. 

  • Powerfully effective. 

noun
  • A heraldic fur formed by a regular tessellation of blue and white T shapes. 

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