on time

The train arrived right on time.

in time (for something/to do something)

Will we be in time for the six o'clock train?

The ambulance got there just in time 

in good time

Get to the airport in good time.

at all times

Hot water is available at all times.

at the same time

She was laughing and crying at the same time.

at times

He can be really bad-tempered at times.

The rain will become heavy at times in the afternoon.

for the time being

You will leave here for the time being.

from time to time

She has to work at weekends from time to time.
 

once upon a time

Once upon a time there was a beautiful princess.

take your time 

There's no rush—take your time.

time flies

How time flies! We haven't seen each other for nearly three years.