5 instances from 2 years 2018 - 4 instances Jan Feb Mar Apr May 17 2 May 17, 2018 2 instances 15:15:09 15:16:38 Jun Jul 6 2 Jul 6, 2018 2 instances 23:31:47 23:31:48 Aug Sep Oct Nov Dec 2017 - 1 instance Jan Feb Mar Apr May Jun Jul Aug 17 Sep Oct Nov Dec