Base Difficulty

Base difficulty: Level 370 edit

Level distribution for noun (shape): 4: 12 12: 2 370: 13 1080: 3 1120: 1 1399: 1

Per-Language Difficulty Overrides

No difficulty overrides set. The base difficulty level will be used for all languages.

Add Difficulty Override
-1 to exclude, 1-1399 for level
Frequency and Tier Signals
Combined Frequency Rank: 1551 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cefr B1 (3 of 6) 4200

Rank used = synthetic rank this tier contributes to the combined frequency rank (lower = more common).

Corpus Frequency
Corpus Freq (per M) Best form Share Zipf rank Forms
19th_books 19.12 5755 100% 3352 2
20th_books 22.08 4429 100% 2984 2
wiki_math 684.08 338 100% 205 2
wiki_geography 0.00 — — — 0
wiki_biology 0.00 — — — 0
wiki_modern_life 40.62 3517 100% 3517 1
wiki_arts 0.00 — — — 0
wiki_society 40.80 3369 100% 3369 1
wiki_linguistics 0.00 — — — 0
wiki_physical_science 84.20 1736 100% 1736 1
wiki_history 0.00 — — — 0
early_modern_science 81.97 2599 100% 1313 2
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 0.00 — — — 0
eu_parliament_debates 0.00 — — — 0
openstax_science 172.36 1100 100% 794 2
openstax_society 469.17 281 100% 253 2
wpa_life_histories 7.09 7649 100% 7649 1

Best form = the single best-ranked form in the corpus, share-blind — how the spelling itself ranked. Share = how much of that spelling belongs to this lemma, when several senses compete for it. Zipf rank = all the forms combined (variant spellings included), each scaled by its share, and what feeds the combined frequency rank. Combining forms improves on the best form, but a share below 100% pushes the other way and usually wins: a sense holding a small slice of a common spelling is a rare word, so its rank lands downrated below the best form — and once it falls past what the corpus can support it is capped at the rank an unlisted word would get.