Tossu-chan
I don't post every day either, 'coz I simply don't always have the time. But few posts a week is enough and I'm sure it doesn't matter you weren't here for a week.
Just put many posts at the day you're here - like I do - and you won't need to post for the rest of the week if you don't have the time. ^_^
I don't post every day either...but when I do go on I post a zillion ((wtf is a zillion? O-o )) times to make up for it.