Alex

[warped mauve]

Be good and take good care of the [...]

[gray marlin]

Thanks

Why is occupe-toi combined?

[dense parrot]

Because it's reflexive and imperative, that's just how it's written

Tu t'occupes bien -> Occupe-toi bien

[gray marlin]

How often is it used?

If I was writing a recipe would I use it?

[dense parrot]

No, recipes tend to use infinitives rather than the imperative, unlike English

Ive seen some with the imperative but I don't know the exact difference in usage in that case

And I'd say aside from things like that, it's used about as much as in english