I was 30 years old before I had an orgasm from penetration. It really never bothered me before. I knew it was just me. That's the way I was wired. Oral will usually always get me off. And of course, external stimulation is pretty surefire.
Now, to give you some exact numbers will require a whole lot of information. And unfortunately, this is information you probably cannot provide. It'll have to come from her. She's really the only one who can answer that question.
Here's an idea: rather than ask us why don't you talk with her about it? Maybe she doesn't care, like me. Or maybe she does and has some ideas.
Just know that there are no hard and fast numbers on anything have to do with sexual intimacy, even with the same partner! Isn't that amazing? It's true. I can have the hardest orgasm from penetration one night, and the next he can't even penetrate because I can't get ready enough. Kind of frustrating until you learn to be creative.
But probably the very worst thing you can do when it comes to sex is to have expectations. I can't perform well under pressure. And please don't tell me what to do during fun time. I mean you can tell me what you want me to do to you, but don't tell me what I should be doing to get myself off.