How frequent do you go out on a date with husband without the kids?

Hi mommy. Since I gave birth with our youngest son in 2012, we never had a chance to have a date or even just having coffee together. Most of the time we are going out with the kids. We enjoy our family date. But just lately I realized this is needed. We need to spent time with our better half to catch up even for 2-3 hours. Now we do go out every 2 weeks if he is not loaded with his work. And I believe this will help both ways to unwind :)