A normal course of treatment varies greatly. Once you have finished the initial series (usually 3 times a week for 6 to 9 sessions) you either stop treatments or go on maintenance and start weaning down - once a week, every two weeks, etc. I know there are some people out there who have monthly ECT for the rest of their lives (Carrie Fischer for one). The longer you go between treatments, the less effective it becomes.

I have had two other series of treatments. The first time we didn't do any maintenance treatments. The second time, we did maintenance but never got below every two weeks because I became to resistant to the seizures (my pdoc will only do 1 or 2 applications in one treatment b/c more than that can cause serious memory loss) as I didn't seize after 2 applications. I think I was on ECT treatments for around 6 months. This time resistance to seizure hasn't happened.

So back to your question... I don't know what a normal treatment course looks like.