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: 1369 (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 68.23 1628 97% 1273 2
20th_books 73.31 1572 97% 1181 2
wiki_math 913.50 177 97% 145 3
wiki_geography 29.88 4296 97% 4425 downrated 1
wiki_biology 0.00 — — — 0
wiki_modern_life 74.09 1939 97% 1997 downrated 1
wiki_arts 91.20 2497 97% 1503 2
wiki_society 65.56 3487 97% 2036 2
wiki_linguistics 64.27 2977 97% 1656 2
wiki_physical_science 74.23 1883 97% 1939 downrated 1
wiki_history 79.15 2923 97% 1694 2
early_modern_science 136.33 1150 97% 833 2
religious_translated 13.89 5072 97% 5224 downrated 1
cooking 112.65 1442 97% 829 2
legal_scotus 4.91 9809 97% 10103 downrated 1
eu_parliament_debates 0.00 — — — 0
openstax_science 86.70 2036 97% 1436 2
openstax_society 20.05 5086 97% 5239 downrated 1
wpa_life_histories 73.96 1415 97% 1193 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.