Question suggested by Diane Simmons, Maine, USA
More than once per month - (s)he is sickly.
About every six months.
Posted: December 14, 2013
Today is March 23, 2018
In this month in 2006:
The Great Ohio Rescue of 15 Kerries in a single day was the largest number of Kerries rescued in a single day. The record was topped later in the same month.