I have only had one job in my entire working life (30 years) which allowed me to take off more than one week at a time. And yes, for most of my working life, I was a 'professional.'
When I was a professional, I had some fairly generous vacation benefits, but I was limited to the extent of time I could take at one swoop. Now that I've given up my career for family reasons I have almost no vacation time (10 days which if you factor in school holidays and the like amounts to almost nothing).
My dh, OTOH, gets 6 weeks per year and can use it however he wants. He has so much accrued vacation time since he's a workaholic, however, that he has converted vast quantities into a 'sabbatical' fund he can cash you when he leaves or convert to health insurance payments if he retires from this job.