reply vs uncertainty

reply

noun
  • Something given in reply. 

  • A counterattack. 

  • A document written by a party specifically replying to a responsive declaration and in some cases an answer. 

  • The answer of a figure. 

  • A written or spoken response; part of a conversation. 

verb
  • To give a written or spoken response, especially to a question, request, accusation or criticism; to answer. 

  • To act or gesture in response. 

  • To repeat something back; to echo. 

uncertainty

noun
  • Doubt; the condition of being uncertain or without conviction. 

  • A parameter that measures the dispersion of a range of measured values. 

  • Something uncertain or ambiguous. 

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