+1!
In the beginning, there was no regular spacing. It took five months for six events from Oct 9, 2014.
After #6, there was a big gap of 5.5 months to #7. #8 followed 4 weeks later. Since then (Sept. 26, 2015) they have been on a mostly steady spacing. 28 have been after 13, 14 or 15 days, two under 20 and four above that, up to 28 days. Add two with a 7 and 12 days spacing.
I also noted that You-Know-Who won #13 with marginal 66,500 points...