There is no hard and fast rule for how often you should post pictures on Instagram, as it can depend on your personal preferences, goals, and content. However, many businesses and influencers post once a day or a few times a week to keep their followers engaged and interested in their content. It's also important to post consistently and at a time when your audience is most active on the platform to maximize engagement. Ultimately, it's up to you to find the posting frequency that works best for your brand and audience.