Base Difficulty

Base difficulty: Level 1399 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: 6802 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 0.92 9546 17% 20000 capped 1
20th_books 1.12 8172 17% 20000 capped 1
wiki_math 0.00 — — — 0
wiki_geography 10.58 2222 17% 9000 capped 1
wiki_biology 23.16 1792 17% 5939 downrated 2
wiki_modern_life 15.21 2553 17% 9403 downrated 2
wiki_arts 0.00 — — — 0
wiki_society 6.21 3656 17% 11000 capped 1
wiki_linguistics 0.00 — — — 0
wiki_physical_science 83.25 435 17% 1649 downrated 2
wiki_history 5.22 4141 17% 9000 capped 1
early_modern_science 0.00 — — — 0
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 3.57 5517 17% 19989 downrated 2
eu_parliament_debates 3.98 3347 17% 11000 capped 1
openstax_science 116.99 220 17% 990 downrated 2
openstax_society 6.47 3146 17% 11000 capped 1
wpa_life_histories 0.00 — — — 0

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.