MIL Competition

So due to work unfortunately me and my husband have been living in separate states for about 6 months. In order to keep up with each other we text mostly(average 10 a day) and that's cool with me we are both very busy people. However I would like to have a conversion over the phone once in awhile but that's usually every other month and he only calls around midnight so our son hasn't spoken to him since we've been apart. If he genuinely didn't have the time I'd understand but he will call his mom as soon as he gets off work and talk with her for hours(at least once a week). I've asked him to do the same for me and he says he'll call the next day and never does. If I call him he says he's to busy. I know it's petty but I'm jealous of the attention he gives his mother over me and his son. I respect the fact that she will always be the number one woman in his life but at the same time I wish he would share the attention. I love her to death and have no problems with her but being apart for so long I wish I could hear him more often than I do. Am I being unreasonable? Any tips to help keep up communication with out feeling like I'm competing with his mom or bothering him?