Base Difficulty

Base difficulty: Level 276 edit

Level distribution for noun (quantitative_concept): 20: 1 26: 1 162: 20 276: 22 380: 20 390: 1 456: 1 460: 1 1000: 1 1050: 2 1070: 2 1080: 5 1090: 1 1110: 1 1120: 1 1202: 2 1203: 1 1204: 2 1206: 1 1210: 2 1211: 1 1213: 7 1218: 1 1225: 2 1226: 1 1399: 21

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: 2260 (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 16.61 4523 100% 4523 1
20th_books 12.62 5335 100% 5335 1
wiki_math 48.37 2060 100% 2060 1
wiki_geography 31.26 4235 100% 4235 1
wiki_biology 68.40 1987 100% 1987 1
wiki_modern_life 49.38 2935 100% 2935 1
wiki_arts 45.17 3020 100% 3020 1
wiki_society 42.55 3247 100% 3247 1
wiki_linguistics 151.62 1005 100% 810 2
wiki_physical_science 89.95 1614 100% 1614 1
wiki_history 30.38 4246 100% 4246 1
early_modern_science 77.04 1506 100% 1506 1
religious_translated 29.39 2994 100% 2994 1
cooking 0.00 — — — 0
legal_scotus 38.04 3278 100% 2411 2
eu_parliament_debates 32.49 2767 100% 2767 1
openstax_science 69.36 1937 100% 1937 1
openstax_society 41.30 3023 100% 3023 1
wpa_life_histories 6.63 7997 100% 7997 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.