ion.Association.frequency_list">[docs]</a>    <span class="k">def</span> <span class="nf">frequency_list</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
        <span class="sd">&quot;&quot;&quot;</span>
<span class="sd">        make a list of all unique items</span>
<span class="sd">        and how many times that item shows up in the journal</span>

<span class="sd">        return a list of tuples:</span>
<span class="sd">        [ (freq, item), ... ]</span>
<span class