autocorrelation
"autocorrelation" is a 15-letter English headword indexed on PlainSpell.
The verdict
“autocorrelation” is uncommon English (frequency #80,212 among 3,931 “A” headwords), classed as a noun. The kind of spelling people second-guess.
- #80,212
- frequency rank, English
- 3,931
- “A” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The cross-correlation of a signal with itself: the correlation between values of a signal in successive time periods.
Corpus desk
Index EN-autocorrelation · autocorrelation · English
autocorrelation · rank #80,212 · 0 variants · 0 confusables
- FREQ-RARE #80,212
- LEN-MEGA 15 letters
- VOW-8 8 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 3,931
- PHOTO-FINISH augurs
Nearest frequency peer: augurs (-1 rank slots)
Read with this headword: Spelling guide for this pattern
Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.
Long-tail ranks near “autocorrelation”
Sparse band: bars invert rank so rarer forms read shorter
- astrophotog…
astrophotography
19,794 corpus weight
- atavistic
atavistic
19,793 corpus weight
- augurs
augurs
19,790 corpus weight
- autocorrela…
autocorrelation
19,789 corpus weight
- Avinash
Avinash
19,786 corpus weight
- Ayako
Ayako
19,784 corpus weight
What this shows Long-tail view: where “autocorrelation” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | autocorrelation |
| Language | English |
| Part of speech | Noun |
| Letters | 15 |
| Frequency rank | #80,212 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “autocorrelation” in English
Rare enough to double-check
autocorrelation is uncommon English at frequency #80,212 among 3,931 “A” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "The cross-correlation of a signal with itself: the correlation between values of a signal in successive time periods.".
We couldn't generate a plausible misspelling set for autocorrelation, a straightforward case of a spelling with little room for common typos. No confusable counterpart is on file for this word, since nothing in our dataset looks or sounds close enough to cause mix-ups.
Etymologically, the entry records: From auto- + correlation. The correct English form is autocorrelation, spelled A-U-T-O-C-O-R-R-E-L-A-T-I-O-N.
Definition
- 1The cross-correlation of a signal with itself: the correlation between values of a signal in successive time periods.
Recorded use
Wiktionary exampleThese source excerpts show how autocorrelation appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Dividing the covariances by the variance gives the autocorrelations.
Etymology
From auto- + correlation.
This word in other languages
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "autocorrelation", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 15 letters (nearest by frequency rank).