Rentals - what's the difference 1 year, 1 month, 1 week, 1 day

The Town of Groton Zoning Regulations are silent on any length of rental - so does that make any length of a rental of a residence a prohibited activity? Lets be realistic, and recognize that rentals for various durations have been and should continue to be a right of the property owner - and trying to enforce a ban on short term rentals is just not reasonable.