 13       9
15 also          9       9
16 petroleum     9       9
17 market       20       8
18 barrels      11       8
19 industry     10       8
20 world        10       8
⋮  (1042 rows total)</code></pre>
<p>The <code><a href="../reference/corpus_frame.html">as_corpus_frame()</a></code> and <code><a href="../reference/corpus_text.html">as_corpus_text()</a></code> functions also work on <em>tm</em> Corpus objects:</p>
<div class="sourceCode" id="cb45"><pre class="downlit sourceCode r">
<code class="sour