quota 

Usage: quota [n]
RESTRICTED TO ADMINISTRATORS.

  The command sets the number of seconds (n) for the shout quota, which
affects only those persons on the shout quota list.  If no parameter (n) is
given, the current setting is displayed.

See ahelp:  lists
See help:   it  shout  shout_abuse  shout_quota

[Last modified: June 23, 1995 -- Friar]