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: 3983 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600

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 6.88 2534 20% 12670 downrated 1
20th_books 5.43 2989 20% 14945 downrated 1
wiki_math 256.82 193 20% 514 downrated 2
wiki_geography 10.65 2574 20% 9000 capped 1
wiki_biology 10.10 2673 20% 9000 capped 1
wiki_modern_life 22.32 1323 20% 6615 downrated 1
wiki_arts 7.66 3514 20% 10000 capped 1
wiki_society 8.41 3280 20% 11000 capped 1
wiki_linguistics 4.80 4008 20% 9000 capped 1
wiki_physical_science 188.95 190 20% 642 downrated 2
wiki_history 12.93 2130 20% 9000 capped 1
early_modern_science 24.44 940 20% 4700 downrated 1
religious_translated 14.39 1430 20% 7150 downrated 1
cooking 0.00 — — — 0
legal_scotus 2.95 5473 20% 20000 capped 1
eu_parliament_debates 8.90 2244 20% 11000 capped 1
openstax_science 116.79 266 20% 984 downrated 2
openstax_society 14.87 1862 20% 9310 downrated 1
wpa_life_histories 3.98 3623 20% 18115 downrated 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.