I don't see the word "boredom" in there.
By the way... look at this. If these are the reasons women cite (are they, or is this both sides?) then even taking infidelity at the lower end, you could add this up and say 50% of wives are apparently getting cheated on and smacked around. But I'm sure you're going to explain to me why this cannot possibly be so.
Boredom is what happens when they "grow apart" and when there's a "communication breakdown".