First, the word accommodation is a mass noun:
accommodation (mass noun) - A room, group of rooms, or building in which someone may live or stay
This is chiefly in BrE. I got it. Next to this on that page we find is...
accommodations (chiefly North American) -Lodgings, sometimes also including board.
Now, how do British refer to more than one accommodation? The reverse, how do Americans refer to a single accommodation?
In India, Do they provide an accommodation? is spoken thousands of times a day. Please confirm that it is utterly incorrect.
Here is a piece from Swan's Practical English.
PS: This confuses me further!
"They sat there for a week, waiting for an accommodation which turned out to be..." - CNN
What is it finally? A countable noun, non countable noun, mass noun?