my ex has unpredictable work.
he has 1 set overnight. if he cant make it then i do allow him to choose another day if he wants. but tbh he usually just gets then in morning after like he would if they had stayed over.
he also has access any other time he wants he's welcome to pick dc up fro here and take them out for an hr or so. we have a decent relationship now.. so generaly i dont need much notice. if i'm free then its fine. but sometimes and not and he doesn't get offended.
but it works both ways. if i have doctors/dentist/hairdressers... i'll see if he wants them for an hr or so while i go to that if he's not working.
again i usually drop them off or he collects.
we dont spend time in eithers homes as its too confusing for dc and upsets them.
oh... and due to my ex sometimes not being able to see them weekly.. he pays for 1 day a week private nursery till they go to school so i am guaranteed some "me time". which is something i cannot stress is a great help and saves me getting frustrated at him being unable to take them.
it gives me 1 day a week where i am GUARANTEED a break away from dc. as obviously nursery is reliable, and wont let you down. and thankfully open during all the hols
if you dh is going to go weeks without contact. i would suggest this as it will be very hard going on ow if she doesn't get a break at all. and will be good at maintaining a healthy relationship between them as parents.
afterall... its as much in his interest that his dc has a mother who's coping and not struggling under the pressure of being a LP. and if paying for 1 day a week nursery is the only way to give her 1 day a week to save her sanity, then its worth thinking about.
you may also find this useful as if you pick a day your dh has that evening off. you can often arrange that he collects dc from nursery? or similarly, drop dc off at nusery after an overnight with him.