After you untick the One-Off checkbox, two extra columns will appear, Term and Total Recurring Price. Enter the number of occurences of the repeating charge, and set the occurence period (i.e. daily, weekly, monthly, quarterly, or yearly)
Repeat the above process until all the adhoc price line items have been created in your price table.
You can change the order of price line items by clicking on the (up/down arrow) icon on the far left of the price line item row. Then drag and drop the line item to the position you require.