Frequency experience

[#1]

I would like to add a frequency or limit on the Experience.

So the Experience will stop after x times if there is no interaction on the Experience. So you can offer a new Experience for this person.

[#2]

Agree. There are examples out there on doing this with profile script based on mbox name but that's not really relevant because frequency capping is usually done based on the content or offer not the mbox.