Data Warehouse attribute that describes its timeframe? I am writing a document about a Data Warehouse system, and would like to know if is there a single word (noun) that describes the DW attribute of how many time it contains? 

I mean, if a DW contains 5 years, I want a noun for it, for instance: the XXX of DW is 5 years.

Likewise we call how fresh the data is as its Latency, and how often the data is updated as Periodicity.
I would go with "the date range encompassed by the data warehouse is x."

This eliminates all possible confusion about the intent by deliberately using words that are understandable by non-technical people.