designation vs uncertainty

designation

noun
  • Selection and appointment for a purpose or office; allotment; direction. 

  • signification, meaning, for example of a word or phrase. 

  • An act or instance of designating; a pointing out or showing; indication. 

  • That which designates; a distinguishing mark or name; distinctive title; appellation. 

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 designation and uncertainty occurred in a corpus of books? (source: Google Ngram Viewer )