It's difficult to answer the question of how often someone should have sex because it varies so much from person to person. Some people might want to have sex every day, while others are perfectly happy with once a week. There really is no right answer, and what works for one couple might not work for another.
That said, there are a few things that can help you figure out how often you and your partner(s) might like to have sex. First, it's important to communicate with each other about your needs and desires. If you're not sure what your partner likes or wants, ask them! It may seem awkward at first, but communication is key in any relationship, sexual or otherwise.
Second, don't put pressure on yourself or your partner to meet some arbitrary quota. Sex should be enjoyable for both of you, not something that feels like a chore. If you're feeling stressed about how often you're having sex, it's likely that will come through during sex itself and make the experience less enjoyable for both of you.
Finally, keep in mind that our libidos can change over time. What works for you today might not work for you in six months or a year from now. Be flexible and willing to experiment until you find a pattern of sexual activity that works well for both of you.