Vaginal dilation

I'm curious how many other ladies out there use vaginal dilators regularly? I've been using them for the past few months and have found them to be very helpful widen me up a bit. I have a longer and narrow vaginal canal. I'm wondering how often others use them, like once or twice a week? I have a set with 4 probe sizes, and I'm up to the third largest size. Still can't get much penetration with largest size yet.

The wife has to use a set of dilators due to the amount of pelvic radiation she has had due to her gyn cancer. She bought a set of Dr. Berman's. The have a vibrating handle. She said if she has to do this everyday, she is going to enjoy it!