Duration Time Scale to Plot on X-Axis Select the time unit scale to plot on the X-axis for the swimmer plot for the duration of response evaluation. Available time metrics are listed in the following table: Time Metric Function Days • Choose this option to measure total duration in days. Weeks • Choose this option to measure total duration in weeks. Months • Choose this option to measure total duration in months. • This option is specified by default. To Specify the Time Scale: Click the appropriate radio button.