pan><span class="bp">self</span><span class="p">[</span><span class="n">key</span><span class="p">]),</span> <span class="n">key</span><span class="p">)</span> <span class="p">)</span>
        <span class="k">return</span> <span class="n">items</span>
</div>
<div class="viewcode-block" id="Association.frequent_first"><a class="viewcode-back" href="../../api/association.html#moments.association.Association.frequent_first">[docs]</a>    <span class="k">def</span> <span class="nf">frequent_first</span><span cl