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Description
In conjunction with MinorUnitValue, determines the time interval between minor tick marks for category axes with a DisplayType of TimeScale.
C#
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Remarks
This value specifies the units of measurement when determining how frequently there will be tick marks on a time-scaled category axis. For example, if MinorUnit is set to Day and MinorUnitValue is set to 2, then there will be 2 days between every minor tick mark.
The default value for newly created charts in ExcelWriter is Days.
This property has no effect for category axes with a DisplayType of Category.