How to specify a number of repetitions for a Repeating section

Hello everyone, first of all I am very excited on how this framework will help us do a better and fast study and very glad the community is active and replies are very helpful.

Now my question:

I want to specify a number of repetitions for a Repeating Section, that is If I want to collect a series of questions (repetitive) for the main, secondary and tertiary options for example. If I set a Repeting group, with these three options someone could do as many (main, secondary or tertiary) they want, but I just need three.

Hope this question is clear

Regards