Marriage: how often are there arguments?

[Clockmeister]

These questions are based on marriages that are approximately 10 +
years.

Are most marriages when both are best friends?
How often are there arguments, and/or resentments?
How often do you think about divorcing?
How many people you know seem to have a healthy relationship?
How many are glad or regret getting divorced?
How many re-marry or have a relationship?

Any comments are appreciated.
Thank You