I rarely get orgasms

Hi,I've been married for a few years, my husband and I have very bumpy relationships. However, this post is about our sex life. Our sex life is pretty good, we have sex about 5 times a week and he tries really hard to give me pleasure. He gave me an orgasm last night by oral sex and it was amazing. And sometimes I get an orgasm by playing with myself while having sex. But it's very rare. Are there any women that have mastered it and could give me an advice on what to do. Please, advise! Thank you for your attention