The speed difference between the second hand and the hour hand is 36- 1 = 35. The time for the second hand to catch up with the hour hand for the first time is: 360 ÷ 35 = 10 2/7 (unit time). When catching up for the first time, go clockwise 1 × 66.
A * * * can catch up with (overlap) 360÷ 10 and 2/7 = 10 (times).
Three-stitch overlap, that is, the least common multiple of 24 and 10 2/7 is 72, which is the first three-stitch overlap, and then it will overlap every 72 stitches. In a circle, a * * * overlap: 360 ÷ 72 = 5 times, regardless of the starting point and ending point, it must be subtracted once.