“Climb up a hill at midday on your birthday every year and look at the Sun. Each year Venus will be three-eighths of the way further round the Sun, drawing a perfect octagram over eight years.” — A Little Book of Coincidence In The Solar System (a curiously intriguing book).
The title strikes me, too, setting the limit as one singular Coincidence. Not, as one might have described, as a little book of multiplicities. Is there a fundamental difference in thinking of these passages of the universe as distinctly joining together, or all part of one thing?