This interactive area chart displays the duration and timing of 51 user traces, with each rectangle representing a single session’s start time along the x-axis and its length in minutes along the y-axis. Clicking a rectangle opens a popup showing trace number, start/end times, and duration. Built with D3 v5, the visualization uses `scaleTime`, `scaleLinear`, `axisBottom`, `axisLeft`, and SVG elements, with background rectangles color-coding activity regions. Data is loaded from a local CSV file, and hover effects highlight individual traces.