It&#x27;s not a common metric, however, when you free lance right you are often told, &quot;I need a piece about x &amp; y, 500 words long.&quot; So based on that 500 words, let&#x27;s say you make $200. So you just made 40 cents a word. But then next article, the editors says &quot;I need a piece about x &amp; y, 800 words&quot; This time you make $400. So instead of trying to explain it like that in these metrics, it makes more sense to just aggregate the numbers together; because the piece lengths vary.