save up for something

"How long did it take you to save up for that arm?"

My daughter had to save up her allowance for weeks to buy one.

They'd been saving up for three years to go there.

How about encouraging people to save up, for a change?

He remembered he'd been saving up for his old age.

We save up our arms and legs for the benefit of nations who don't know what to do with them!

Because their father took the money the mother saved up for the two boys they cannot visit the University anymore.

But if you can save up for this place, do so.

You either save up for one big thing, or be patient with the younger, smaller ones.

It was important enough to save up for special occasions.