What was the frequency prior to his every 3-days? Personally, I'd be ecstatic if my H would do that. Right now I'm lucky if I get once every 3-4 weeks.
I think you need to take a good look at where you were before to find a good compromise. If you aren't satisfied you aren't satisfied, BUT....at what point is it you asking him to meet your needs without any compromise? He seems to be, from what I've gathered, working pretty hard...and keeping up to a pretty good schedule. So what would you be willing to compromise on...what have you agreed in the past would be ok?