What these breeds have in common
The Hound Group holds the breeds built to find and follow quarry, split between scent hounds working with their nose to the ground and sight hounds running it down. Beagles, Basset Hounds, Bloodhounds, Dachshunds, Greyhounds, Whippets, Afghan Hounds, Salukis and Rhodesian Ridgebacks are all here.
It is the least useful group for predicting a grooming appointment, and it is worth saying so plainly. The dogs were grouped by what they do, and what they do says almost nothing about the coat. This group contains both the lowest maintenance coats in dogs and one of the highest.
So read the coat rather than the group. There are effectively two hound grooming articles and they have nothing in common.
What this group means for grooming
Splits hard: short smooth coats that need almost nothing, and long silky coats such as the Afghan that need more work than any other breed.
What actually decides the grooming
The coat type, not the group. It sets the tools, the interval and the price, and two dogs in this group can need completely different appointments.