JfreeChart timing charts are rendered in hours and seconds - jfreechart

This is what I need. Obviously, it is written with a JavaScript plugin,
But my requirement is to write it in Java. I came across the jfree chart plugin.
My requirement: Divide the hours into intervals,
draw the chart in seconds for rendering,
I don't know where to start now. I can now render once every hour,
But I don't know how to divide the hour and use the seconds to render the chart.
Thank you for reviewing my question and looking forward to your reply

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