The last lesson counted how much of a page a list covers. This one turns the question round. Ignore the list and count the page: which words appear most, and how much of the page do they fill? The answer does not depend on any list. It is a fact about the text.
The rank of a word
The lab counts every word of the text, ranks the different ones from the commonest down, and adds up the share as it goes. The passage has 936 words and 361 different ones. The commonest, I, appears 30 times and is 3.2% of the page. The commonest ten together are 25.6%.
Ten, fifty, a hundred
Three numbers sum up the shape of the list. On the passage, the ten commonest words cover 25.6%, the fifty commonest cover 54.5% and the hundred commonest cover 67.7%. On the play excerpt, with 605 different words, they cover 24.9%, 50.5% and 63.3%. On the modern documents, with 603 different words, 24.7%, 47.3% and 60.6%. The shapes are close. A quarter of a page is ten words, and about two thirds is a hundred.
What kind of word
Read the first ten of the passage and sort them. There are three pronouns for people, I, she and you, and it, which stands for a thing. There is and, which joins, and that, which in this passage joins too: in fourteen of its seventeen places it ties a verb to what follows (persuaded that, I find that), and in three it points (on that point). There are the, to and of, which go in front of a noun or a verb. And there is was, the past of be. Do not call it a helping verb here: the course Helping Verbs found that be is mostly a main verb, and in this passage not one of the twenty was is followed by an -ing verb. It stands before a quality (was proud), a participle (was roused) or a thing (there was a time).
This is why a quarter of a page costs a reader almost nothing, and also why knowing the ten does not get you through the page. They are the frame. The words that say what the page is about are in the other three quarters.
Where the subject shows
Text by text, the grammar part of the list stays the same and the subject part changes. In the play, the speakers' names Cecily and Algernon are in the ten. In the modern documents, age is, because a report on an older population says it again and again. The lab shows this when you switch the text, and the switch is worth making before you read the quiz.
The rest of the page
After the hundred, the list falls steeply. The passage's 361 different words, less the first hundred, share 32.3% of the page. Many of them appear once. These are the words that say what the passage is about, and the table of words not covered, in the lesson before, lists the ones you have to look up.