Imho, the order in the list does not matter. Select all the columns and use the sort and filter function of Excel (2010, but all versions have it I think). Then you can select all applicable frequencies from a pull-downlist when you click on the column header. Or better you can even use compound relational filters (frequency larger than X and lower than Y). Only those rows with frequencies (cell values in general) that match show up in the list.
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