How do we know - Nun in pension??

Today, during the diner, I was watching Tv show in our national Tv. They were talking about going to pension and other stuff for older popularity. I almost ate all diner, when nun called to the studio. Leader of the show, asked her, what does it mean if the NUN GOES IN PENSION???? Ok I said, thats a very interesting question. I asked myself, if we "normal people" go to pension, that means, that we stop working in our full time job, right? But what does it change for nuns? Do they stop to pray for the almighty lord - god?? Who crops the roses?.. and what do they live for, if they are in pension?? I still havent found the answer, did you??