/// <summary>
/// Formats a string from a given timespan to a nice, human readable,
/// based on the most prominent unit set in the span.
/// </summary>
/// <param name="span">The timespan to format.</param>
/// <returns>A pleasant string.</returns>
public static string ToHumanReadableString(this STimeSpan span)
{
int totalMonths = span.GetApproximateMonths();
int totalYears = span.GetApproximateYears();
return(span switch
{
{ TotalSeconds : <= 1 } => $@"{span:s\.ff} second{(span.Milliseconds != 1 ? "s" : "")}",