At once

And they all atonce begane to make excuſe. The fyrſt ſayd vnto him: I have bought a ferme / and I muſt nedes goo and ſe it / I praye the have me excuſed.

Can you pat your head and rub your belly at once? He tried to eat four cookies at once.

Tell the doctor to come at once. She is having a baby.