Yes, you can do it.
In the rules of work, click Configure time.
Then click on the Add period button or open an existing period for editing.
Specify the working time of the resource.
Next, click Add step.
Or edit an existing step.
Pick Custom time and then select Custom settings.
Then select the hours and minutes of recurrence.
The calendar settings will look like this:
Here is a demo of 15 minutes intervals: