As $nvnick($chan,0) isn't in the official help file, I won't recommend using it, although it does return the same result as $nick($chan,0,r)
Some helpers seeing $nvnick and not finding it in the help file will presume that it references a custom alias.
The recommended format is $nick($chan,0,r) to obtain a count of the regular (non-voiced, non-half-opped, non-opped, etc.) people in the specified channel.
