"I needed a certain amount of time to get experience to understand."

I spent a certain amount of time learning my trade.

But with a certain amount of research, you can find out who they are, and start making phone calls.

Yet he did have a certain amount going for him.

Because they were big, he needed a certain amount of time to run between them.

To make sure you worked a certain amount of time during the year?

He's always had a certain amount of problems in training.

However, I do use this with a certain amount of common sense.

A certain amount has been done, but it is far from enough.

At the same time, a certain amount of understanding is important.