How many times can you download the same Sims 3 base game + expansion packs on different laptops?

I have the sims 3, late night, pets, seasons, and generations

They have all been downloaded on another computer, and I'm wondering how many times you can download them on a different computer. Because I really don't want my laptop to break, have to buy a new one, and then find out I have to buy another sims 3 because it's not working

I'm asking because my sister says that there are some games you can only instal 1 or 2 times, and I've been reading around about the sims and some people have been saying you can only do it 3 times, some say 5 times

I just REALLY don't wanna re-buy all my games

Thanks