This is often the case in situations in which a child lives with one parent during certain parts of a year or week, and lives with the other parent during other times. (wisegeek.com)
The bad thing is certain parts of the year due to vacation time whole towns and shops seem to be closed. (law.stackexchange.com)
Although I'm sure they shoot up drastically during certain parts of the year! (theinspiredroom.net)