What time of day should I let my puppy out?

Hey,

I have a cocker spaniel puppy , I am keeping him in my apartment , please tell me What time of day should I let my puppy out?

Take your puppy outside right after each meal. When his stomach is full, there is more pressure on his bladder. After eating, he'll need to urinate quickly.
Set up his sleeping area near yours so you can hear him if he wines during the night. Also, take him out as soon as he wakes up in the morning. Don't let your puppy roam outside and relieve himself anywhere he wants. Guide or carry him to a specific location. Place him on a grassy spot in your yard; or take him to a place where other dogs have urinated.

Regards.