I count 2 strides for take off and landing and then 4 steps every stride
A canter stride is about 12 feet and is about 4 steps. Two canter strides would be 8 steps etc. Landing and take off from a jump is two steps each. Hope that helps! Oh and a bounce would be about 9 feet or 3 steps. You'll have to adjust for your horse though etc.
Count 12 steps. 12 steps for each stride