I think it's not bad. Notify the top three candidates in about three days ~

I think we should think about it and give you an answer in a week or so ~

You can't say you're sorry for more than 7 days ~ he won't inform you that you can't ~ as long as you know it yourself ~

If you work for a company, you will usually be notified within 5 working days ~

Don't wait more than 5 working days ~ unless there are special circumstances ~