But people have known me over a long period of time.

In a play you have a long period to get an idea across.

Sometimes I do not see the king for a long period.

"You have to keep people involved over a long period of time."

I have known you well over a long period of time.

And a long period of economic growth began in 1961.

And then came a long period of working on things which never got done.

Doing these things will help your body work well for a longer period of time.

I cannot talk to people for a long period of time.

You could stand on your head for a longer period than that!