antecedence vs greatest importance

antecedence

noun
  • That which precedes something or someone (e.g. prior events, origin, ancestry). 

  • The length of time by which one event or time period precedes another. 

  • The relationship between a pronoun and its antecedent. 

  • The relationship of preceding something in time or order. 

  • A geologic process that explains how and why antecedent rivers can cut through mountain systems instead of going around them. 

greatest importance

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