export declare enum units {
    millisecond = "millisecond",
    milliseconds = "milliseconds",
    second = "second",
    seconds = "seconds",
    minute = "minute",
    minutes = "minutes",
    hour = "hour",
    hours = "hours",
    day = "day",
    days = "days",
    week = "week",
    weeks = "weeks",
    month = "month",
    months = "months",
    year = "year",
    years = "years"
}