People will often return to your website if you noticed from the Google Analytics tool. There are always returning users and new users. Returning users are coming back either because they expect to find something new or because they were referred back from search engine or social media.
Visitors who find your content useful will most likely return expecting to find something great. Do not disappoint them. As a blogger, you must have something new after a certain period of time. It could be hourly, daily, twice in a week, thrice in a week, weekly, monthly etc.
When you disappoint from your usual frequency, you will not only be scaring your readers, you will also be scaring the search engine robot or spider that crawls your site with a certain frequency.
Instead of disappoint, use schedule to make sure posts follow the normal frequency.