Base Difficulty

Base difficulty: Level 162 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: 755 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
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 174.83 709 100% 536 2
20th_books 212.63 644 100% 468 2
wiki_math 252.21 897 100% 516 2
wiki_geography 162.33 1648 100% 875 2
wiki_biology 28.29 4214 100% 4214 1
wiki_modern_life 150.28 1766 100% 984 2
wiki_arts 595.02 309 100% 188 2
wiki_society 260.43 991 100% 524 2
wiki_linguistics 93.96 2286 100% 1255 2
wiki_physical_science 82.45 1767 100% 1767 1
wiki_history 323.05 785 100% 402 2
early_modern_science 219.35 910 100% 527 2
religious_translated 56.08 2980 100% 1553 2
cooking 0.00 — — — 0
legal_scotus 51.19 3557 100% 1929 2
eu_parliament_debates 155.02 1205 100% 734 2
openstax_science 147.44 1346 100% 905 2
openstax_society 162.31 1358 100% 849 2
wpa_life_histories 111.87 1122 100% 813 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.