Friday and Saturday of each week, in November/December at least.
Grand Cayman
As far as I know, they arrive every morning except for Friday and Saturday. However, I've only visited Grand Cayman over winter break so I'm not sure if there's a span of time that cruise ships don't arrive in Grand Cayman.
If you're traveling by plane, then yes. I'm not sure about cruise ships though.
A Cruise Ship
I am a Caymanian and i live here in Cayman and go to school here. Cruise Ships do not come EVERY day. But most of the time they do. Its pretty rare when you drive into town and see the waterfront empty. The most Ive seen of Cruise Ships a day is Seven.
Most of these countries (Mexico, Cayman Is.) don't require a visa regardless of nationality if you are on a cruise. You should however, call your cruise-line for specific details.
The names of the three Cayman Islands are Grand Cayman, Little Cayman, and Cayman Brac.
Grand Cayman is an island in the country known as the Cayman Islands
There are three. Grand Cayman, Little Cayman, and Cayman Brac.
Grand Cayman Thrush was created in 1886.
Grand Cayman, Cayman Brac, and Little Cayman.
Grand Cayman, has the most residents out of Little Cayman, and Cayman Brac.