at a time / at any time

• at a time 따로 따로, 한 번에

They took showers one at a time.

The children went down the slide two at a time.

The elevator holds five people at a time.

Can you help me move these boxes?

> Yes, but they're heavy, so let's move them one at a time.

 

• at any time 언제라도, 아무 때나

You may give birth at any time.

The library is open 24 hours a day.

I can study there at any time.

People can call the police at any time.

Can I visit you at three o'clock on Saturday?

> I'll be home all day. You can visit at any time.