boldness vs uncertainty

boldness

noun
  • The relative weight of a font; the thickness of its strokes. 

  • The state of being bold; courage. 

  • presumptuousness 

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