Has an AFL game ever ended 136-75?
Exactly once. On September 22, 2017, Adelaide beat Geelong 136-75, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 136-75 in league history.
That makes 136-75 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 137-75 has happened 2 times and 136-76 has happened 3 times.