I go to two different therapists once a week - so it is two therapy appointments a week but not with the same person. I realize some of what I think about twice a week is related to seeing two different people, but I think the concept is the same.
It works well for me. Just seeing the first one once a week left me frustrated and enraged and confused for several days after each appointment. Going a second time helps curb that for me. I do not discuss either therapist or appointment info with the other one. I think seeing the same one twice could do the same thing, but the first one I see only works Mon-Wed. I pay out of pocket. I did see the first one twice in a week once and it was helpful that one week.
Seeing two different ones has kept the dependence down for me.
I have a fairly flexible work life, so time is not much a deal for me.