Base Difficulty

Base difficulty: Level 1206 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: 9794 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 7.07 463 3% 14139 downrated 2
20th_books 7.54 436 3% 13558 downrated 2
wiki_math 2.38 2007 3% 8000 capped 2
wiki_geography 9.33 780 3% 9000 capped 2
wiki_biology 3.31 1815 3% 9000 capped 2
wiki_modern_life 9.89 432 3% 10000 capped 2
wiki_arts 5.55 980 3% 10000 capped 2
wiki_society 2.73 1473 3% 11000 capped 1
wiki_linguistics 1.06 2959 3% 9000 capped 1
wiki_physical_science 1.25 3002 3% 8000 capped 1
wiki_history 2.91 1302 3% 9000 capped 1
early_modern_science 4.66 966 3% 10400 capped 2
religious_translated 3.19 1228 3% 10400 capped 2
cooking 2.39 1291 3% 5200 capped 1
legal_scotus 4.00 1238 3% 20000 capped 2
eu_parliament_debates 2.26 1709 3% 11000 capped 2
openstax_science 4.23 1396 3% 11000 capped 2
openstax_society 10.23 381 3% 11000 capped 2
wpa_life_histories 16.28 250 3% 7309 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.