Hierarchy classification:

1. top of the aat hierarchies
2. Associated Concepts Facet
3. Associated Concepts (hierarchy name)
4. [concepts in the arts and humanities]
5. [historical, theoretical, and critical concepts]

Anotations

Scope note:

The length of time during which something runs its course, characterized by some prevalent or distinguishing condition, circumstance, or occurrence, or by the rule of a particular government or dynasty; a distinct historical or cultural portion or division of time.