I don't think you are out of line by being miffed at all. My husband travels a lot and we have always stayed in touch with daily phone calls - that's the rule and always has been for 34 years of marriage. To me that's being considerate of your partner's feelings - also keeping that connection alive.
I would be miffed if he only called every 3-4 days. And we're not clingy or super dependent on each other either. We have a strong, loving relationship, and we're also two separate individuals with our own lives at the same time.
In my opinion, you have a right to be a little upset.