I have told my wife many times that in the NHL playoffs, overtime goals are typically scored in the first few or last few minutes of a period. Nothing to back that up, but it’s always been ‘conventional’ wisdom. So I made some charts over lunch to actually see what the data look like, and here you go (first thumbnail is OT, and the second is 2OT):
As you can see, there is some trend towards scoring at the beginning of a period, but little evidence to support a flurry of goals scored in the dying minutes of overtime (especially in 2OT!). There were only 12 3OT, two 4OT, and two 5OT games during this time span, and wouldn’t have been very interesting to graph.