My own prescription for myself allows up to 4x a day. I get by with 1-2 times. I have hock (talus) OCD.
For the hose, it depends on what it’s for and whether it’s something you’d wrap or not, but I would lean towards 1-2x a day as well unless really acute. When my horse tore a muscle and had a huge hematoma, vet said ice, ice, ice, laser, PEMF, Voltaren. Because he’s a sensitive red head, I wound up not being able to use much of it topically after a few days because his skin got scurfy. Of course it did.