TL;DR: word frequency reveals two different problems depending on why you're reading it: for general writing, it flags the "pet words" you don't notice repeating; for SEO drafts, it's the difference between clear topical focus and keyword stuffing that Google's spam policies explicitly penalize. Pair this guide with Word Frequency Counter, Readability Statistics, Character Counter and Text Difference.
A frequency count is just a table: word, count, percentage of total words. What makes it useful is what you compare it against — your own habits, or a target keyword's natural density.
Word frequency for editing: catching your own tics
Every writer has words they lean on without noticing — "actually", "very", "really", or a favorite verb that shows up on every page. A frequency count surfaces these instantly, because a word that feels invisible while writing becomes obvious once it's the fourth-highest count in a 500-word draft. This is why the check works best after a first draft, not during — the point isn't to write mechanically, it's to catch repetition you're too close to the text to notice.
Stop words (the, a, and, to, of) will always dominate any frequency count in English — that's expected and not a signal of anything. Filter them out, or ignore the top of the list, and look instead at the first content word that repeats more than feels intentional.
Keyword frequency for SEO: density without stuffing
For SEO drafts, the same table answers a different question: does this page cover its topic clearly, or does it repeat the target phrase past the point of sounding natural? There's no fixed "ideal keyword density" — the number search marketers cited in the 2000s (2-3%) was never a real ranking factor, and Google's own spam policies explicitly list keyword stuffing — "repeating the same words or phrases so often that it sounds unnatural" — as a violation, not a technique.
The practical test isn't a percentage, it's whether a sentence still reads naturally if you say it out loud. If a keyword shows up in every single sentence, or shows up in a sentence where it doesn't grammatically belong, that's stuffing regardless of what the frequency number says. A page can rank well while mentioning its main topic only a handful of times, as long as related terms, synonyms, and genuinely useful information surround it.
A workflow that works for both cases
- Paste the draft into Word Frequency Counter once the first draft is done — not while still writing.
- Skip the stop words at the top; look at the first content word repeating more than expected.
- For SEO text specifically, check whether the target keyword and its close variants appear naturally, not forced into every paragraph.
- Reread the flagged sentences out loud — if a repetition sounds awkward spoken, rewrite it; if it sounds fine, leave it.
- Run Readability Statistics as a second pass once repetition is under control.
Common mistakes to avoid
- Treating the raw count as a rule — a word appearing 8 times in a 2,000-word article is not automatically a problem; the same count in 200 words is.
- Chasing a specific keyword density percentage instead of reading for natural flow.
- Replacing every repeated word with a synonym reflexively, which can make text sound like a thesaurus exercise instead of writing.
- Ignoring that stop words will always top the list — that's not the signal you're looking for.
Word frequency is a diagnostic, not a target. Use it to find what to reread, not a score to optimize blindly — and if the SEO angle applies, remember Google penalizes text that reads as stuffed regardless of the number behind it.