When Fëanáro is feeling sociable she hangs out with him. He finishes his novel. (In it, the school turns him over to social workers and adopt him out, he escapes his foster family, he encounters a dragon and talks his way past it with stories about Arda, he studies wizardry and is unreasonably effective at it, when the dragon opens a portal to Arda he sneaks through too and the Valar slay the dragon, he fixes his mother with magic, and then he masters planar travel himself and conquers Bella's plane.) He finishes his typewriter, too; Bella's of the opinion that it would have been easier if he made vowels separate instead of consonant-hats, but it works okay like so. She acquires one when there is more than one, and learns to type, because crystal balls are a long time coming.
She has made some progress, though. She finds the common thread in dud combinations that produced an aura, and successfully decomposes all her original spells into pieces and begins to make new combinations. Most of these are trivial like the increased character limit arcane mark. Reverse-engineering her undead-damaging spell, though, gets her (small) arcane healing well in advance of when she was expecting to have that down. So anybody who lives on her block and cuts themselves cooking breakfast can knock on her door - or that of anybody who's getting the spells as she turns them out - and get that seen to without bothering a Maia.
Once a month she sees Miriel. Bella doesn't have any ideas that land any better than "forget you forgot something". But forgetting the contents of that foolish, foolish oath is at least a holding pattern that lets Miriel pretty much live her life, so, therapeutic success? ...Bella makes sure to remind Fëanáro that he is very adorable and lovable and adored and loved.
"I had to put that spell together really fast," Bella murmurs, when Fëanáro's visible leaping a few blocks away. "The date snuck up on me. Has anybody invented the wall calendar?"
"Yeah. And sometimes a picture on the opposite side of the page for every month but I don't need that part."
"Have I mentioned lately I like gift economies? Well, this one, I probably wouldn't like all possible gift economies."
"I thought he'd like it and it looks like I was right. I have this vain hope that when he knows enough different spells he'll be paralyzed with just enough indecision not to use them all up before breakfast every time he wakes up."
"...You know, I actually got a set of hourglasses once they were available and I never confirmed that days are the same, but my sleep schedule's not slipping weirdly or anything... Uh, year at home is three hundred sixty five days."
"I, um."
Bella grabs some scratch paper and does some arithmetic.
"And I've been here about a - year?"
"But I mean, like - to the extent when I got here I was nineteen I'm like twenty-three, twenty-four now. ...If the days are even the same. I should check if the days are the same, the Trees might be keeping me on a longer cycle -"
She goes home to her hourglass set. Six seconds, least casting of illusory sound. Ten of those to a minute, sixty minutes to an hour, twenty-four hours in a day.
She compares and does arithmetic. She can ballpark some of it without having to sit around all day, she has old notes on how much sand and how big the aperture -
And she sits back in her chair.