Please note:
these are Microsoft definitions, We can't change or redefine formats or values. Outlook will not accept any other values!
Microsoft definitions:
Type:
constant specifying the frequency of occurrences for the recurrence 
OlRecurrenceType (
{
    olRecursDaily = 0,
    olRecursWeekly = 1,
    olRecursMonthly = 2,
    olRecursMonthNth = 3,
    olRecursYearly = 5,
    olRecursYearNth = 6
};
Interval:
number of units of a given recurrence type between occurrences. For example, setting the Interval property to 2 and the RecurrenceType property to Weekly would cause the pattern to occur every second week. 
NoEndDate:
True if the recurrence pattern has no end date. (True or False)
Occurrences:
number of occurrences of the recurrence pattern. This property allows the definition of a recurrence pattern that is only valid for the specified number of subsequent occurrences. For example, you can set this property to 10 for a formal training course that will be held on the next ten Thursday evenings
Duration:
Number indicating the duration (in minutes) of recurrence pattern. 
Instance:
Number specifying the count for which the recurrence pattern is valid for a given interval. This property is only valid for recurrences of the olRecursMonthNth and olRecursYearNth type and allows the definition of a recurrence pattern that is only valid for the Nth occurrence, such as "the 2nd Sunday in March" pattern. The count is set numerically: 1 for the first, 2 for the second, and so on through 5 for the last. Values greater than 5 will generate errors when the pattern is saved.
DayOfMonth:
number indicating the day of the month on which the recurring appointment or task occurs
MonthOfYear:
number indicating which month of the year is valid for the specified recurrence pattern. Can be a number from 1 through 12. For example, setting this property to 5 and the RecurrenceType property to olRecursYearly would cause this recurrence pattern to occur every May.
Regenerate:
True if the task should be regenerated following this pass through the recurrence pattern. This property is used to control the regeneration of the task as each occurrence of a recurring task is completed.
DayOfWeekMask:
constant representing the mask for the days of the week on which the recurring appointment or task occurs. Monthly and yearly patterns are only valid for a single day. Weekly patterns are only valid as the Or of the DayOfWeekMask.
OlDaysOfWeek
{
    olSunday = 1,
    olMonday = 2,
    olTuesday = 4,
    olWednesday = 8,
    olThursday = 16,
    olFriday = 32,
    olSaturday = 64
};