Base Difficulty

Base difficulty: Level 310 edit

Level distribution for noun (human): 5: 9 19: 1 310: 45 330: 2 340: 1 370: 1 390: 1 400: 2 405: 1 1000: 4 1010: 1 1020: 3 1030: 2 1040: 5 1050: 1 1060: 8 1070: 8 1120: 7 1130: 5 1399: 66

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: 2011 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 8.83 7101 100% 7101 1
20th_books 7.99 7345 100% 7345 1
wiki_math 35.70 2545 100% 2545 1
wiki_geography 104.85 2626 100% 1313 2
wiki_biology 0.00 — — — 0
wiki_modern_life 0.00 — — — 0
wiki_arts 38.29 3526 100% 3526 1
wiki_society 117.46 2175 100% 1187 2
wiki_linguistics 33.10 3250 100% 3250 1
wiki_physical_science 0.00 — — — 0
wiki_history 89.14 2769 100% 1519 2
early_modern_science 27.70 3571 100% 3571 1
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 113.71 1735 100% 1076 2
eu_parliament_debates 213.21 841 100% 546 2
openstax_science 43.19 2891 100% 2891 1
openstax_society 178.42 1353 100% 780 2
wpa_life_histories 9.84 6118 100% 6118 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.