3. The method of claim 2 , wherein determining a frequency of occurrence of the associated key temporal terms or time spans for each key term or key concept comprises, for each key term or key concept, generating a graph of a number of occurrences of references to the key term or key concept in association with the key temporal terms or time spans.
4. The method of claim 3 , wherein determining the frequency of occurrence of the associated key temporal terms or time spans further comprises performing pattern recognition on the graph to identify portions of the graph representing potential temporal categorizations for the domain.