I want to ask what's the "interval of time in posting" must to be considered, to get away from being a spammer or banning my account.
AFAIK there's no rule about posting too fast. sometime ago I saw someone making 2-3 posts in 10 minutes for a full hour and didn't even get banned. so I think you won't get banned as long as
1. your posts are not considered off-topic or insubstantial,
2. not having the same content as your previous posts,
3. not trolling or advertising a site, or
4. not posting too much on the pointless daily thread on the off-topic section.
I'm sure there's more. but that's all I can think of