Base Difficulty

Base difficulty: Level 4 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: 2297 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cambridge_yle Movers (2 of 3) 750
cefr A1 (1 of 6) 800

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 17.43 1377 17% 5190 downrated 2
20th_books 16.33 1455 17% 5544 downrated 2
wiki_math 14.40 2115 17% 6761 downrated 2
wiki_geography 6.08 3721 17% 9000 capped 1
wiki_biology 5.07 3994 17% 9000 capped 1
wiki_modern_life 12.61 3513 17% 10000 capped 2
wiki_arts 25.37 1820 17% 5469 downrated 2
wiki_society 8.68 4585 17% 11000 capped 2
wiki_linguistics 0.00 — — — 0
wiki_physical_science 339.85 78 17% 271 downrated 3
wiki_history 23.08 1727 17% 5912 downrated 2
early_modern_science 170.59 151 17% 600 downrated 2
religious_translated 30.81 741 17% 3422 downrated 2
cooking 12.02 2144 17% 5200 capped 2
legal_scotus 0.00 — — — 0
eu_parliament_debates 0.00 — — — 0
openstax_science 246.02 106 17% 391 downrated 3
openstax_society 0.00 — — — 0
wpa_life_histories 9.65 2701 17% 8185 downrated 2

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.