at random
on a random basis

Take a number at random between one and a million.

All of this seems to take place more at random than by plan.

Did you think it came into my hands at random?

He turned at random to the right along the river.

I mean, does she go and pick people at random?

They stood in a line and called words at random.

With my eyes still closed, I open the book at random.

At random times, they were given a choice to take their money and stop.

I took the first turning at random, then the next.

Taking out her brown book, I opened it at random.

But these are not colors to be used at random.

Then he knew there would be no use asking questions at random.

"Or does it just happen all the time at random?"

I turned it on at random and got this Western.

The notes followed one another at random, the way a child might play.

But he did not talk at random; each character got a personal approach.

"It's not people being pulled over on the street or road at random simply because of how they look," he said.

On the third, the problems are not consistent, but we're still running into them at random times.

He would point at random and wait for his surprise.

This could have been done at random, but I doubt it.

If you test at random, everyone has a chance to be tested.

In fact, they were assigned to these groups at random.

He turned at random to various pages in the book and read.

And two draws are made, at random in each case.

He did not care to venture into one at random.