second method
Print amount second for the corresponding locale. The unit is abbreviated
if abbreviated is set to true.
Implementation
@override
String second(int amount, [bool abbreviated = true]) {
  if (abbreviated) {
    return 'ث';
  } else {
    if (amount == 1) {
      return 'ثانية';
    } else if (amount == 2) {
      return 'ثانيتين';
    } else if (amount > 2 && amount < 11) {
      return 'ثواني';
    } else if (amount > 10) {
      return 'ثانية';
    }
    return 'ثواني';
  }
}