fragile vs infirm

fragile

adj
  • Feeling weak or easily disturbed as a result of illness. 

  • Easily broken or destroyed, and thus often of subtle or intricate structure. 

  • Thin-skinned or oversensitive. 

noun
  • Something that is fragile. 

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. 

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