I think 2 weeks. I've had a break from my current T for about 1,5 years, but that was because I was doing alright. Until I was totally depressed again and finally called for help.

This year she had one week of vacation. And next week she'll have 2,5 weeks vacation. I won't see her for 3 whole weeks. I don't like it, but she deserves to have a vacation.