On this page you select you input file and which items in the file that you want to use for the analysis.
You have the option to specify the time series as an old LITPACK wave climate (with Data type 102). In this case it is assumed that the duration of each wave event (% of year) is defined in item 1 of the file. The analysis will then consider the duration of each event in the analysis. And the resulting number of events for each class is then reflecting the number of seconds the class properties is taking place instead of the number of timesteps in the input file.