I don't use mine anymore since I don't have a garage at the moment, but when
I did, I religiously hooked up the charger in winter, and only sporadically
in warmer weather - usually when I was sure I wouldn't be using the car for
a week or more or when I was getting something out of the trunk anyway and
it was easy to connect it up. Now that the car lives on the road I've
realised how good the Westco battery is: it's only run down completely once
and required disconnecting, bringing inside, and recharging for two days or
so until it was fully charged. At that point the car had been standing in
sub-zero (C) temperatures for over two weeks without being driven. Since
then I've gone for up to a week without using the car and it still cranks
ok, though not nearly as vigorously as if I drive it every day. If your
battery is still relatively ok you should be able to go for a week or more
without driving/charging it. If you drive regularly anyway (i.e. every day)
I doubt you'll need to connect it up every time.

Eric