In your eggdrop.conf file, you will have this setting, change it however you want it.
Set here the time (in seconds) that someone must have been off-channel
before re-displaying their info line.
#set wait-info 5
!infoline add text to add for infoline
to add a new infoline, or replace an old one.
NOTE: text for infoline is restricted to 120 characters. Exceeding this limit will cut the text off.