Automatic Habit of Meditation

In psychology, a ***habit*** is defined as a behaviour done automatically, requiring little conscious effort. I have meditated recently pretty much every second day, but I fail to see any automaticity; its incredibly effortful to sit and meditate for me still. **Does Buddhism have anything to say about forming such habits? Is there any knowledge -- whether in the scriptures or from personal experience -- suggesting the ideal frequency of meditation (to form a habit)?** Here, I mean the frequency which would enable consistent and automatic sitting and meditation. Also, does consistency relative to **the hour of the day of meditation matter at all?** Any information is welcome, thank you.