From Brassard's instructions :
"At home, you should dilate 4 times per day with, #1, #2 for 5, 15
minutes for one month.
Dilate 3 times per day with #1, #2, #3 for 5, 10, 15 minutes for two months.
Dilate twice a day with #2, #3, #4, for 5, 10, 15 minutes for 3 months
Dilate once a day with #3, #4, for 5, 15 minutes for 6 months.
Slowly increase the interval of time between each dilation until you
reach one dilation per week with #4, for 15 minutes for the rest of
your life.
If you have difficulties with a bigger size dilator, wait before you
are comfortable with this one before using a bigger size. You can go
back to a smaller size and increase the frequency for a few days."
He's VERY specific, at least, up to the year mark. I appreciated that.
Personally, I'm a bit over a year post-op now, and I admit I went to every other day on pretty much day #366 because I was so tired of it.

Fortunately, that worked fine; skipping a day in between hasn't made dilations any more difficult. In another month or so I may try every third day, and so on.