public Frequency ToUnit(FrequencyUnit selectedUnit) => new Frequency(ToTheOutSide(selectedUnit.Unit), selectedUnit);
 public double As(FrequencyUnit ReturnInThisUnit) => (double)ToTheOutSide(ReturnInThisUnit.Unit);
 public Frequency(int value, FrequencyUnit selectedUnit) : base(value, selectedUnit.Unit)
 {
 }
 public static Frequency From(double value, FrequencyUnit unit) => new Frequency(value, unit);
 public Frequency(decimal value, FrequencyUnit selectedUnit) : base(value, selectedUnit.Unit)
 {
 }