3 Hz from a watch crystal
You could do a 3:1 gear ratio and do the divisor at 32768.

32768 = 10,923 + 10,923 + 10,922 which indicates a state machine that first counts to 10,923 repeats and then drops a count, it would be accurate every 3 seconds. The worst absolute error you would see is 31 PPM which is about what the crystal can do (depending on your crystal).