Input: blue shaft with two gears fixed on it.
Yellow block and pink block rotates idly on a fixed shaft. Each block has identical cam. The yellow rotates faster tha the pink.
Output: orange rocker. Its roller contacts both cams. Motion of the follower is as fast as in case there is no the pink cam but the working cycle is long (every three revolutions of the yellow cam).
Tooth number of the blue gear 12
Tooth number of the pink gear 18
Tooth number of the green and yellow gears: 15
The cycle can be very long by altering gear tooth numbers.