Data downloads
Every list and analysis on PlainSpell can be downloaded as a CSV file. The Wiktionary-derived columns are licensed CC BY-SA 4.0; the search figures behind the rankings are Microsoft Advertising and Google Ads estimates reported through DataForSEO, and the files give the ranks, not the counts. Each file's first line names its sources, dates and licence.
The files
| File | What it holds |
|---|---|
| Measured misspellings | Every published wrong spelling with its right word, its rank by Bing searches (US, Sept 2025 to Aug 2026) and its share of the word's searches. |
| Search share against written share | Misspellings measured both in search (Bing) and in writing (wordfreq). |
| ie and ei in English words | Counts of ie and ei after c and elsewhere, rule followed or broken. |
| English headwords by part of speech | Counts of English headwords in the English Wiktionary. |
| American and British spelling pairs | Pairs Wiktionary labels by region, with each spelling's written frequency. |
| Letter frequency | Letter shares in running text and in the word list. |
| Word pairs people search | Every published pair with its kind, ranked by how often it is searched on Google and Bing (US). |
Sources: English Wiktionary (dump of September 2, 2026), wordfreq 3.1, Bing and Google US search data (September 2025 to August 2026). How each is made: methodology.