I check the email every day, or at least every weekday. I can't guarantee when submissions will end up on the portal though. First I have to actually read them and make sure everything is ok with them before I can add them. That combined with be just being a busy guy can add delays. So sometimes it may end up there right away other times it can take some time before i am able to actually post it up on the portal.
The second part of that is really all that applies to fan art as I don't actually have to read anything.
I can tell you that I did receive your submission, I just haven't had the opportunity to place it on the portal as of yet. Don't worry it will get there.
What usually ends up happening is that I will get a lump of time and be able to add a few things at once, depending on how well to time your submission it can end up on the site right away.