This visualization compares two data series on a shared timeline: one series plots numeric x/y values with stepped and natural curves, while a second set overlays planned versus real operation dates and costs for drilling activities. The chart uses two linear scales for the primary data, a time scale for the right axis, and a band scale for rotated operation labels along the bottom. It is built with D3 v5, rendering SVG circles and paths via `d3.line` and curves, with data loaded from a TSV file and a hardcoded JavaScript array.