I chose "other," too.
I think a regular basis is more important that the length of the posts. Readers can get frustrated and lose interest if they need to wait too long, or lose the thread of the story entirely. Once or twice a week doesn't matter.
On the other hand, each individual post should be long enough to carry the story forward. It doesn't matter to me how long the post is, as long as it's a coherent story section.
One thing I do agree with, though: the author should make sure to have a decent buffer. I'm still embarrassed about the story I started posting several years ago without finishing it... not to mention the one that a certain fellow FoLC is twiddling his thumbs about.
So give us what you can, Yvonne, and when you can. But we'd all appreciate consistency.
Hazel