Hmm thats what I call a leading question and very difficult to give an answer to
Sparrowhawks have a plucking post mostly in the breeding season though. You may wander passed these a fence post tree stump etc with feathers spread around. Usually in a copse or wood.
This'll give you an idea as to territory.
This time of year, They tend to go on the hunt early morning. ( 1st light)
Urban areas, they can be seen cruising the roof tops or sometimes even sitting on fences looking for feeding starlings blackbirds, smaller birds on bird tables etc
Farm land they can be seen flying ( buzzing) hedgerows trying to flush / panic sitting birds into making a mistake.
If you have no idea as to a local Spars territory you may well spend months looking for one and even then fail
Breeding seaon, the males will have females to impress and chicks to feed so they will need to hunt more often.
You do ocassionally see them "last llight" if the am hunt has been unsuccessful. But cold days cold nights, high metabolic rates, if the morning hunt has been un-successful then they might already "be in trouble".