Base Difficulty

Base difficulty: Level 400 edit

Level distribution for noun (communication_information): 5: 1 19: 6 295: 28 370: 1 400: 36 420: 1 440: 32 460: 1 470: 2 1000: 8 1040: 1 1060: 2 1070: 10 1080: 1 1110: 16 1120: 2 1207: 1 1220: 1 1399: 83

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: 4367 (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 2.68 7514 33% 20000 capped 1
20th_books 1.96 8928 33% 20000 capped 1
wiki_math 31.95 1275 33% 3825 downrated 1
wiki_geography 56.70 1525 33% 2494 downrated 2
wiki_biology 13.59 3231 33% 9000 capped 1
wiki_modern_life 57.04 1689 33% 2586 downrated 2
wiki_arts 8.81 4848 33% 10000 capped 1
wiki_society 18.22 4619 33% 7046 downrated 2
wiki_linguistics 0.00 — — — 0
wiki_physical_science 45.35 1784 33% 3144 downrated 2
wiki_history 0.00 — — — 0
early_modern_science 34.05 1965 33% 3295 downrated 2
religious_translated 4.77 5072 33% 10400 capped 1
cooking 0.00 — — — 0
legal_scotus 14.77 3894 33% 6368 downrated 2
eu_parliament_debates 6.34 3870 33% 11000 capped 1
openstax_science 88.66 788 33% 1587 downrated 2
openstax_society 0.00 — — — 0
wpa_life_histories 2.61 7748 33% 20000 capped 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.