How often do you all go for regular dental checkups?

I usually brush my teeth thoroughly.
Still, I'm wondering if I should get a separate regular check-up.
Are there many people who go every 6 months even if they have no symptoms?
I am wondering if just going for a check-up would be helpful.
Do you get scaling done when you go for your check-up?
I am also wondering if it is better to make a reservation in advance.
Is there a reason you continue to attend even though there are no particular problems?
How is everyone doing their check-ups?