Base Difficulty

Base difficulty: Level 5 edit

Level distribution for noun (occupation): 5: 8 19: 1 20: 1 30: 21 278: 1 305: 30 311: 24 350: 1 370: 1 390: 1 405: 4 1000: 7 1020: 2 1030: 4 1040: 2 1060: 3 1070: 2 1078: 7 1080: 1 1110: 1 1120: 9 1200: 2 1210: 1 1225: 1 1399: 18

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: 988 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cambridge_yle Flyers (3 of 3) 1200
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 32.70 3112 100% 2314 2
20th_books 43.33 2684 100% 1792 2
wiki_math 0.00 — — — 0
wiki_geography 157.44 1314 100% 876 2
wiki_biology 0.00 — — — 0
wiki_modern_life 72.25 3195 100% 1929 2
wiki_arts 1082.69 135 100% 93 3
wiki_society 60.49 3732 100% 2171 2
wiki_linguistics 0.00 — — — 0
wiki_physical_science 0.00 — — — 0
wiki_history 338.27 645 100% 379 2
early_modern_science 0.00 — — — 0
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 6.47 8690 100% 8690 1
eu_parliament_debates 0.00 — — — 0
openstax_science 0.00 — — — 0
openstax_society 78.47 2862 100% 1573 2
wpa_life_histories 50.10 2420 100% 1556 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.