Almost same as /bi but for areas . To tell us a procent of the placed blocks; who built and how many blocks. Even it will tell us just how many blocks are built in that area would be great (no names no time but a number!).
Some more details:
If you aren't bored yet : The command would be something like /AreaInfo (/ai) , maybe /AreaInfoFilled (/aif) for filled space and /AreaInfoUnfilled (/aiu) for unfilled space (exe: where a build was griefed , to repair grief, we'll know how many blocks to repair (for vet+ not op+! they have /undo player)) , and it will tell who (when) built/deleted/modified an area.