@David *******
No set number. I know several people who come here multiple times a year and have no issue on visa exempt entries. They’re like offshore workers or pilots who’s family live here and are rarely questioned because the time spent overseas versus the time they stay doesn’t raise any red flags for the immigration officer.
Quite a few posts have people saying a immigration officer has told them they can’t stay for more than 180 days in a year. That’s bullshit but a line some of them try to use.
That said there’s probably an equal number of posts from people that say they were stopped an questioned after
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/5 attempts as the officer suspected they may be working or something.
If entering wearing a business suit you probably would never be questioned. If entering with dreadlocks and a singlet you quite probably would be (made up speculations by me).