def parse_day_of_week_info(requirements_string):
    """
    Get check time info for day of week info from a requirements string.
    """
    has_day_of_week_info = " WEEKENDS" in requirements_string or \
        " WEEKDAYS" in requirements_string
    assert has_day_of_week_info, "No weekend/weekday info supplied"
    include_weekends = "WEEKENDS" in requirements_string
    include_weekdays = "WEEKDAYS" in requirements_string
    return {
        "include_weekends": include_weekends,
        "include_weekdays": include_weekdays
    }