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: 4844 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cefr A2 (2 of 6) 2100

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 4.59 4882 20% 14893 downrated 2
20th_books 2.99 6541 20% 19361 downrated 2
wiki_math 31.79 1186 20% 3682 downrated 2
wiki_geography 17.39 1643 20% 8215 downrated 1
wiki_biology 73.35 549 20% 1809 downrated 2
wiki_modern_life 44.08 706 20% 3030 downrated 2
wiki_arts 64.22 460 20% 1888 downrated 2
wiki_society 14.00 2006 20% 10030 downrated 1
wiki_linguistics 4.80 4029 20% 9000 capped 1
wiki_physical_science 100.64 353 20% 1335 downrated 2
wiki_history 11.51 2380 20% 9000 capped 1
early_modern_science 19.35 1518 20% 5688 downrated 2
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 3.08 5358 20% 20000 capped 1
eu_parliament_debates 12.74 1713 20% 8565 downrated 1
openstax_science 41.37 850 20% 3354 downrated 2
openstax_society 18.67 1486 20% 7430 downrated 1
wpa_life_histories 4.85 3870 20% 13404 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.