Annually (calendar year)_code defining a yearly forecast.

Four week period (13 periods per year)_code defining a forecast for four week intervals.

Semi-annually (calendar year)_code defining a forecast for the first six months of the year or the second six months of the year.

Just-in-time_self explanatory.

Quarterly (calendar quarters)_code defining a forecast by calendar quarter(s). (jan-mar, apr-jun, jul-sep, oct-dec).

Flexible interval (from date x through date y)_code defining a forecasted usage that is planned between two defined dates.

Monthly (calendar months)_code defining a forecast by calendar month(s).

Weekly_code defining a forecast for weekly intervals.

Daily_self explanatory.

Discrete_flexible frequency according to planning process.

Mutually defined_code reserved for special trading partner requirements when pre-defined codes do not exist.