Time span format?

inline std::string FormatTimeSpan(double Time)
{
    using namespace std;

    string names[] = {
        "second",
        "miniute",
        "hour",
        "day",
        "week",
        "year"
    };

    double ajustment[] = {
        60, // seconds
        60, // minutes, minuets in
        60, // hour, hours in
        24, // day, days in
        7,  // week, weeks in,
        52
    };

    string ret;
    double units = Time;

    for(int i = 0; i < sizeof(names); i++)
    {
        long long unit = fmod(units, ajustment[i+1]);
        units = units / ajustment[i+1];

        string unit_name = names[i];

        if(unit != 1)
            unit_name.append("s");

        string str_unit;
        stringstream str;
        str << unit;
        str >> str_unit;

        ret = str_unit + " " + unit_name + " " + ret;

        if(units < 1)
            break;
    }

    return ret;
}