I have this
pvoice 180 #CHANNEL $nick
but it's gave voice approx 15-20 sec randomly. I thought it would wait 120 sec (2 mins) before giving user a voice. What am I missing?

mIRC help isn't clear to me .. unless I'm missing something?
/pvoice <delay> [#channel] <nickname>

Works the same way as the /pop command except that voices a user.

Thanks in advance