Time Span Scale

View model

using System;
using System.Collections.ObjectModel;
using CommunityToolkit.Mvvm.ComponentModel;
using LiveChartsCore;
using LiveChartsCore.Defaults;
using LiveChartsCore.SkiaSharpView;

namespace ViewModelsSamples.Axes.TimeSpanScaled;

public partial class ViewModel : ObservableObject
{
    public ISeries[] Series { get; set; } =
    {
        new ColumnSeries<TimeSpanPoint>
        {
            Values = new ObservableCollection<TimeSpanPoint>
            {
                new TimeSpanPoint(TimeSpan.FromMilliseconds(1), 10),
                new TimeSpanPoint(TimeSpan.FromMilliseconds(2), 6),
             // new TimeSpanPoint(TimeSpan.FromMilliseconds(3), 3),
                new TimeSpanPoint(TimeSpan.FromMilliseconds(4), 12),
                new TimeSpanPoint(TimeSpan.FromMilliseconds(5), 8),
            },
        }
    };

    public Axis[] XAxes { get; set; } =
    {
        new Axis
        {
            Labeler = value => TimeSpan.FromTicks((long)value).ToString("fff") + " ms",

            // when using a date time type, let the library know your unit // mark
            UnitWidth = TimeSpan.FromMilliseconds(1).Ticks, //mark

            // if the difference between our points is in hours then we would:
            // UnitWidth = TimeSpan.FromHours(1).Ticks,

            // since all the months and years have a different number of days
            // we can use the average, it would not cause any visible error in the user interface
            // Months: TimeSpan.FromDays(30.4375).Ticks
            // Years: TimeSpan.FromDays(365.25).Ticks

            // The MinStep property forces the separator to be greater than 1 ms.
            MinStep = TimeSpan.FromMilliseconds(1).Ticks, // mark
        }
    };
}

Form code behind

using System.Windows.Forms;
using LiveChartsCore.SkiaSharpView.WinForms;
using ViewModelsSamples.Axes.TimeSpanScaled;

namespace WinFormsSample.Axes.TimeSpanScaled;

public partial class View : UserControl
{
    private readonly CartesianChart cartesianChart;

    public View()
    {
        InitializeComponent();
        Size = new System.Drawing.Size(50, 50);

        var viewModel = new ViewModel();

        cartesianChart = new CartesianChart
        {
            Series = viewModel.Series,
            XAxes = viewModel.XAxes,

            // out of livecharts properties...
            Location = new System.Drawing.Point(0, 0),
            Size = new System.Drawing.Size(50, 50),
            Anchor = AnchorStyles.Left | AnchorStyles.Right | AnchorStyles.Top | AnchorStyles.Bottom
        };

        Controls.Add(cartesianChart);
    }
}

Articles you might also find useful: