[SSHd] Increasing wait time?

[Gilles]

Hello

I'm a bit tired of people trying to break into SSH:

May  6 16:59:23 freebsd sshd[24649]: Invalid user agatha from
195.43.9.246
May  6 16:59:26 freebsd sshd[24651]: Invalid user cristie from
195.43.9.246
May  6 16:59:29 freebsd sshd[24653]: Invalid user number from
195.43.9.246
May  6 16:59:31 freebsd sshd[24655]: Invalid user chamber from
195.43.9.246
etc.

Is there a way to configure SSHd, so that the wait time between login
attempts increases after X failed tries?

Thank you.