frequency

Controls the display frequency of the data returned. * **D** = Daily * **W** = Weekly, based on the last day of the week of the start date. * **M** = Monthly, based on the last trading day of the month. * **AM** = Monthly, based on the start date (e.g., if the start date is June 16, data is displayed for June 16, May 16, April 16 etc.). * **CQ** = Quarterly based on the last trading day of the calendar quarter (March, June, September, or December). * **AY** = Actual Annual, based on the start date. * **CY** = Calendar Annual, based on the last trading day of the calendar year.