precept vs uncertainty

precept

noun
  • An order issued by one local authority to another specifying the rate of tax to be charged on its behalf. 

  • A rule or principle, especially one governing personal conduct. 

  • A written command, especially a demand for payment. 

  • A rate or tax set by a precept. 

verb
  • To act as a preceptor; to teach a physician-in-training by supervising their clinical practice. 

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