feebleness vs unease

feebleness

noun
  • The quality or state of being feeble; debility; infirmity. 

unease

noun
  • Trouble; misery; a feeling of disquiet or concern. 

verb
  • To make uneasy or uncomfortable 

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