doctrine vs uncertainty

doctrine

noun
  • A self-imposed policy governing some aspect of a country's foreign relations, especially regarding what sort of behavior it will or will not tolerate from other countries. 

  • A belief or tenet, especially about philosophical or theological matters. 

  • The body of teachings of an ideology, most often a religion, or of an ideological or religious leader, organization, group, or text. 

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