Create and post all content or add it bit by bit?

Hello everyone,

I am in the process of creating an authority niche site. In this niche, there are 25 or so main topics that I want to post about (it's an educational niche).

Would I be better making the site and starting with 10 or so articles and adding another every week or so, or should I just add them all at once? Are there any benefits or drawbacks doing it one way or another?

One other related question is, as this is an educational site and this niche has these 25 topics, once they're all posted there won't be a great deal of fresh content I can add. Is it possible to grab and maintain a top Google ranking without adding this fresh content?

Thanks in advance.

Make the site ,post 5 and 1 every day if you can.When you post constantly its way much better than once. G@@le sees fresh content everyday and loves it.It looks like you update the website.I am talking from experience,one of my best sites,after 1,5 year,once i posted an article,it was indexed within 5 minutes and ranked easily for medium competitive keywords in my niche without any backlink.
If you update constantly you will see a big difference in you ranking.

Bit by bit is Much better, there will be time when you will have no content to post and that really frustrates.... so add them slowly. just my 2 cents.

It would be better if you Drip feed your contents, post maximum 2 contents per day...

Post content bit by bit, It wont works if you post all your content at same time