A group of estates that admits a common set of rates is called a(n):

In land revenue administration, specific terminology is used to categorize land for assessment purposes. An Assessment Circle refers to a defined geographical area or a group of estates that are subject to a common set of rates or assessment principles. This standardization simplifies the process of calculating and collecting land revenue.

• An 'Estate' is a single, distinct property unit.
• A 'Holding' refers to the land possessed by an individual or family.
• A 'Revenue Block' might be a broader administrative division, but it is not specifically defined by a common set of rates for assessment in the same way an Assessment Circle is.