volume business
noun
COMMERCE ukus [ U ]
trade in large quantities of a product or products:
Discounters rely on attracting volume business.
The range includes a couple of diesels but the volume business is expected to come from the 1.6 petrol model.
[ C ]
a business that has a large number of sales:
Online broking is a volume business that has matured during a long and roaring bull market.