Keyword Density and Most Used Words: What They Tell You

What keyword density is

Keyword density is the share of a text taken up by one word or phrase. The calculation is the number of times the word appears divided by the total number of words, multiplied by 100. A word used 10 times in a text of 500 words has a density of 2 per cent.

The idea comes from early search engines, which looked for pages that repeated the search words. Writers were told to hit a certain percentage, and the habit stayed long after search engines became more sophisticated.

Why there is no ideal percentage

There is no target density that search engines reward. Google has said repeatedly that repeating a word many times is not a way to rank, and its guidelines treat keyword stuffing as a violation. A text that uses a word at an unnatural rate reads badly and can be treated as spam.

The better approach is to write naturally about the topic. A text about a subject will mention its main words many times without effort, and it will also use related words, which signal the topic to both readers and search engines.

What a most-used-words list is good for

A frequency list is useful as an editing tool, not as a target. It shows which words a text repeats most, so you can check that the main topic is clear and spot habits that you did not notice, such as using “really”, “very” or “just” too often.

It also reveals repetition in a short text, such as a title or an ad. If the same word appears three times in 40 words, one of them can usually go.

How this counter builds the list

The list in the details section shows the ten most used words of your text, with the number of times each appears and its share of all words. Words are compared in lower case, so “Text” and “text” count as the same, and single letters and pure numbers are left out. If your text is short and every word appears once, the list shows the first words instead of an empty result.

Common small words such as “the”, “and” and “of” often top the list in a long text. That is normal and says little. Look below them for the content words.

Reading the list

Check that your main topic words are near the top. If a text about gardening never mentions the word “garden”, its focus may be unclear. If a single content word makes up more than a few per cent of the text, read the passage aloud and see whether it sounds natural.

Pay attention to words that you want to use less often. A frequent filler word is a sign of loose writing, and cutting it makes the text shorter and clearer.

Density for different kinds of text

A short ad or a title has a very high density for its keyword by necessity, and that is fine. A long article has a low one. A technical text repeats its terms because it has to use them consistently. These differences show that a single percentage cannot be a rule.

Compare drafts instead: if a revised version has a similar list but fewer filler words, the edit improved the text.

Writing for people first

Search engines use many signals to understand a page, including the meaning of the whole text, the headings, the links and how people use the page. Writing clearly for readers and covering the topic completely is the most reliable way to serve both.

Use the frequency list at the end of the process as a check, and never as a template. If the list shows nothing surprising, your text probably reads naturally.

An example calculation

Suppose an article of 800 words uses the phrase “character counter” 12 times. Each use of the phrase is two words, so you can count it as 12 occurrences of the phrase, a density of 12 divided by 800 times 100, which is 1.5 per cent. If you count the single word “counter” instead, and it appears 20 times, its density is 2.5 per cent.

Neither figure is good or bad. What matters is that the text reads naturally and that the main topic is clear. If you read the paragraphs aloud and the phrase sounds forced, reduce it, whatever the percentage says.

Long phrases and synonyms

A frequency list counts single words, so it does not show how often a phrase of several words appears. For a phrase, search the text for it and count the results yourself, or use the find function of your editor.

Synonyms and related words matter too. Writing “counter”, “tool”, “checker” and “calculator” in different places is natural, and it helps readers who use different words for the same thing. A text that repeats one term mechanically is harder to read.

A quick checklist

• Calculate density as occurrences divided by total words times 100.
• Do not aim for a fixed percentage.
• Use the most-used list to find repetition and filler.
• Check that the main topic words appear naturally.
• Read the text aloud to confirm that it sounds natural.

The counter shows the list for any text you paste, in any language it can segment.