Two and a half weeks when DD1 was just turned 2, when my father died and I had to travel to Australia for the funeral and to sort his estate. DH stayed at home.
In the last two years, 4 nights with work, a few times a year (DDs 6 and nearly 4).
DH regularly spends 3 or 4 nights away with work.
I miss them but they're well looked after. We FaceTime daily. I enjoy the leisurely mornings and free time after work