Onair:

if (% [ $+ [ $nick $+ time ] ]) {
  inc -c $v1
}
else {
  set % [ $+ [ $nick $+ time ] ] 1
  inc -c % [ $+ [ $nick $+ time ] ]
}

Offair:

if (% [ $+ [ $nick $+ time ] ]) {
  set % [ $+ [ $nick $+ time ] ] % [ $+ [ $nick $+ time ] ]
}
else {
  halt
}