Just Google it. There are hundreds of sources and no one refutes it because it's true.

Here is a quick summary of how often.
President Trump hit an important milestone as he returned to Florida over the Thanksgiving holiday: 100 visits to Mar-a-Lago. In 1,040 days as president, he has prioritized visiting his properties over the course of his presidency, making time for nearly 400 visits to the businesses that he still owns and profits from. Of all of his properties, it appears that Mar-a-Lago is his favorite to funnel untold sums of taxpayer money to, even rebranding Mar-a-Lago the “Winter White House.”