The first lesson ended on three words that lose their vowel when they are said: is, will and not. They lean on the word before, and the result is a single sound where the page shows two words. Writing has a name for the short form and a way to show it.
What a contraction is
A contraction is two words written as one, with an apostrophe where letters were left out. Do not becomes don't. I will becomes I'll. It is becomes it's. The apostrophe marks the gap, and the part after it is the small word with its vowel gone.
There are seven endings to know: n't for not, 'll for will, 'm for am, 're for are, 've for have, 'd for would or had, and 's for is, has or belonging. Every one but the belonging 's stands for a word from the list in the first lesson.
How much of not is written n't
The lab counts, on three printed texts, every n't against every not. On the 1,975 words of the play it finds 22 n't and 14 not, one of them inside cannot, so 22 of the 36 are short, which is 61.1%. On the 936-word passage from the novel it finds 1 and 12, which is 1 of 13, or 7.7%. On the two modern documents it finds 0 and 10.
Counted once over each whole text, which no page can carry, and quoted here, the play has 168 n't against 143 not, which is 54.0%, and the whole novel has 12 against 1,397, which is 0.9%. The samples in the lab point the same way as the whole texts: most of the play's not words are short, and almost none of the novel's.
Which kind of text contracts
Text that is made to be said. The play was written for people on a stage to talk to each other, and in it more than half of the not words are short. Careful text that is made to be read contracts little, and that is as true of a court opinion from 2025 as of a novel from 1813.
That is the difference between the page and the voice, and it is the reason the first lesson's list matters more for listening than for reading. The reader's text has the full form. The speaker's does not.
The ending that is not one answer
's and 'd stand for more than one word, and the lab does not guess. It lists every one it finds with all the full forms, and you sort them by the word that follows. After 'd, a verb in its base form means would; a past form means had. After 's, a past form means has and an -ing form means is. When a noun comes after it, look at the word in front: it, he, she, that or there in front means is (it's the excuse I've always given), and a name or a thing in front means belonging (Mr. Worthing's ward). These are rules of thumb that you apply by eye, and the lab does not count them.
What the count cannot tell
It reads words and not sounds. It counts n't where it is written, so it cannot say how often a speaker in 1895 or today says the short form when the full one is printed. It counts cannot, written as one word, as a not written in full: the play has it once, in I cannot help expressing a wish, and it is one of the 14. A writer who puts do not in a character's mouth may be asking for stress on it. The play is talk written for the stage, and it shows what a writer chose to give to people who are talking.
What to do with this
Read the full form aloud, and then say the short one. You are saying the same words with the small one flattened, which is what the first lesson described. When you are listening, expect the short forms to be the normal ones in talk, and listen hardest for n't, because it is the one that reverses the sentence.