Do you shave every thirty minutes?

I run to the toilet every thirty minutes.

He runs off to the lab every half hour.

'In half an hour.'

Half an hour passed.

It took half an hour.

Please wait half an hour.

I've been waiting half an hour.

I've been waiting half an hour.

Give me thirty minutes.

It's a half hour till lunch.

We leave in half an hour.

We'll see each other in half an hour.

Tom was sitting silent for half an hour.

The car broke down after half an hour's driving.

It took half an hour.

It took half an hour.

It took half an hour.

He will be here in half an hour.

I've got half an hour.

I woke up thirty minutes ago.

You're thirty minutes late.

You're thirty minutes late.

You're thirty minutes late.

I'll be a half hour late.

We have 30 minutes.

Your thirty minutes are almost up.

You were thirty minutes late.

You were thirty minutes late.

Tom is thirty minutes late.

I've been waiting the last half hour.

I've been waiting for half an hour.

I'll be back in half an hour.

I'll be back in 30 minutes.

I've been waiting for almost half an hour.

He came half an hour late.

Tom left half an hour ago.

I've been waiting for the bus for half an hour.

You're half an hour late.

We leave in half an hour.

Tom came half an hour late.

The counting of the ballots took half an hour.

You're half an hour late.

Tom was gone thirty minutes.

This is just a tiny part of the sky the Kepler stares at, where it searches for planets by measuring the light from over 150,000 stars, all at once, every half hour, and very precisely.