How long is it normal to wait before you give the best answer thingy

As soon as I read a very good answer I then mark it as the best answer or even just a brief answer to my question. For me everything is on first come first basis. But I really don't post a lot of topics though.

Though the guidelines says tat it should be about a week tat you have picked up a BR, I have some of them lying for ages. But I am doing justice to them. For me it is more than 10 days before I have done it all.

Before, I usually have to wait for a week for I'm going to give a best response to my post/s but there were times that I waited for a month to hand it specially if there's only a handful response/comments in my discussion/s.

I have finished my work choosing best response for my discussions. That was not easy work to do. There are more than 30 discussions unresolved. The responses got by the discussions almost right. These make me hard to choice the best response. So, in order to avoid this kind difficult work in the future, I am planning to choose best response after 3 days the discussion started. I think after three days, there is no other member will respond to the discussion. I have noticed that 1 x 24 hour is the peak time of receiving responses for my discussions. After 1 x 24 hours, there are one or two responses.