$nduration in $_timeago for VitruxPT

alias nduration {
  if (!$1) { return 0 }
  if ($1) && ($1 !isnum) { return 0 }
  if ($1 >= 31557600) {
    var %y = $floor($calc($1 / 31557600))
    return %y year $+ $iif(%y !== 1,s) $+ $chr(44) $duration($calc($1 % 31557600))
  }
  if ($1 >= 2629800) {
    var %m = $floor($calc($1 / 2629800))
    return %m month $+ $iif(%m !== 1,s) $+ $chr(44) $duration($calc($1 % 2629800))
  }
  else { return $duration($1) }
}