I have a website in a somewhat competitive niche that was getting a little bit of traffic. I replaced the index page with an "under construction" type of page for about a month until the new version was live. Now my website gets no to very little traffic from search engines. I am not working on any kind of link building at the moment, only adding content. So my question is, how long do you think that it generally takes to start getting traffic again from search engines (Google)?