</span>
<span class="sd">        Equivalence class is followed  and checks for the patterns generated for periodic-frequent patterns.</span>
<span class="sd">        :param prefix:  main equivalence prefix</span>
<span class="sd">        :type prefix: periodic-frequent item or pattern</span>
<span class="sd">        :param itemSets: patterns which are items combined with prefix and satisfying the periodicity and frequent with their timestamps</span>
<span class="sd">        :type itemSets: list</span>
<span