The fact that the experts are changed periodically seems to me a very important point.

On the first floor of the museum is an exhibition area that changes periodically.

As with all sports teams, a few faces change periodically.

Now, try and keep all those in your brain, never mind having to periodically change them, voluntarily or under pressure.

These floods would periodically change the channel of the river.

The interior of the theater has art hung on the walls which is changed periodically.

This member changed periodically so no special attachments could be formed.

Staffing will periodically change as people retire or are promoted.

This is most often done by periodically changing every such password to a new, random value.

The museum has a high density of objects on display, and the displays are changed periodically.