diff --git a/axis.go b/axis.go
index 762a6a2..af104a8 100644
--- a/axis.go
+++ b/axis.go
@@ -176,7 +176,6 @@ func (a *axisPainter) Render() (Box, error) {
 
 	unit := opt.Unit
 	if unit <= 0 {
-
 		unit = ceilFloatToInt(float64(dataCount) / float64(fitTextCount))
 		unit = chart.MaxInt(unit, opt.SplitNumber)
 		// 偶数
diff --git a/xaxis.go b/xaxis.go
index 61698d7..5557015 100644
--- a/xaxis.go
+++ b/xaxis.go
@@ -40,7 +40,7 @@ type XAxisOption struct {
 	FontSize float64
 	// The flag for show axis, set this to *false will hide axis
 	Show *bool
-	// Number of segments that the axis is split into. Note that this number serves only as a recommendation.
+	// Number of segments that the axis is split into. Note that this number serves only as a recommendation to avoid writing overlap.
 	SplitNumber int
 	// The position of axis, it can be 'top' or 'bottom'
 	Position string
@@ -55,6 +55,8 @@ type XAxisOption struct {
 	// The offset of label
 	LabelOffset Box
 	isValueAxis bool
+	// This value overrides SplitNumber, specifying directly the frequency at which the axis is split into, higher numbers result in less ticks
+	Unit int
 }
 
 const defaultXAxisHeight = 30
@@ -90,6 +92,7 @@ func (opt *XAxisOption) ToAxisOption() AxisOption {
 		TextRotation:   opt.TextRotation,
 		LabelOffset:    opt.LabelOffset,
 		FirstAxis:      opt.FirstAxis,
+		Unit:           opt.Unit,
 	}
 	if opt.isValueAxis {
 		axisOpt.SplitLineShow = true