Write SQL query to solve given problem: For the employees who have the highest pay frequency, please list their vacation hours.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T2.VacationHours FROM EmployeePayHistory AS T1 INNER JOIN Employee AS T2 ON T1.BusinessEntityID = T2.BusinessEntityID WHERE T2.BusinessEntityID = ( SELECT BusinessEntityID FROM EmployeePayHistory ORDER BY Rate DESC LIMIT 1 )