Idk how to ask him

So I been married for a 1 year and 3 months I always notice my husband wasn't really into having sex in the beginning of are marriage.... we would have sex maybe I could say 2 times a week and I dint like to pressure him because there was days he would reject me and I felt unwanted so that's the reason why I'm asking this what should I do should I ask him if something is wrong these been going on for a wile now we only have sex 5times a months there's times I just wish he would want more sex with me. he can actually go like 2to3 weeks with out having sex and like I said I don't know how to ask him I don't want him to ever feel pressure but I'm his wife and I need him too I don't know how to ask him with out making him feel like it's something he has to do to keep me happy I want him to do it because he wants to not because I ask him too

Or am I wrong for wanting more sex in are marriage..