Film Processing

Hello,

I would like to know how long after film is exposed should it be

developed? How much picture quality does an exposed frame loose, in

say, one month after the shot has been taken? I ask this because

sometimes it will take me two or three months to use one roll of

film. Either because I will use half of the roll and then let my

camera sit for a month or two and then use the remaining shots, or

because I can switch rolls of film during mid-roll on my camera and

sometimes take advantage of this feature and let the half used roll

sit on the counter for a month or two, or even three months before I

use the rest.

Thank you,

CHH