I've been using the "beta budgeting" feature to set budget totals over a 12-month budget period (January to December). When I open up the "Trends" page, navigate to the "Transaction Totals and Counts by Category" section, and choose one of the categories that I have regular expenses in, the graph is displayed as if the amount budgeted for the year was budgeted for January alone and other months didn't have budgets for the category at all ("Budgeted: N/A"). the "budgeted" data would parallel the "actual spending" data when there isn't a discrepancy, so that it doesn't make it look like there's a discrepancy in either the "regular small transactions that add up" case or the "single large transaction once a year" case, but a second-best option in my opinion would be to treat a budget period covering a larger span than a single point on the graph as if its budgeted amount was evenly divided between the points in that span.