It depends on the teenager it is not an exact science
not long
The teenager can decide just how long to spend the vacation with a parent, however if the parent disagrees then the decision can be reversed.
2 years
The 2003 Ford Focus is 14 ft. 0.1 in. (168.1 in.) long.
The 2005 Ford Focus is 14 ft. 0.5 in. (168.5 in.) long.
The 2014 Ford Focus is 14 ft. 10.5 in. (178.5 in.) long.
The 2006 Ford Focus is 14 ft. 0.5 in. (168.5 in.) long.
The 2004 Ford Focus is 14 ft. 0.1 in. (168.1 in.) long.
The 2009 Ford Focus is 14 ft. 7 in. (175 in.) long.
The 2011 Ford Focus is 14 ft. 7 in. (175 in.) long.
The 2001 Ford Focus is 14 ft. 0.1 in. (168.1 in.) long.
The 2012 Ford Focus is 14 ft. 10.5 in. (178.5 in.) long.