Base Difficulty

Base difficulty: Level 1399 edit

Level distribution for noun (concept_idea): 19: 2 26: 1 27: 1 221: 28 270: 30 274: 30 275: 28 280: 25 300: 1 360: 1 380: 2 1000: 1 1030: 1 1060: 5 1070: 6 1110: 4 1120: 4 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: 4200 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 0.00 — — — 0
20th_books 0.58 9718 11% 20000 capped 1
wiki_math 17.07 1027 11% 7020 downrated 2
wiki_geography 22.92 612 11% 5508 downrated 1
wiki_biology 30.91 533 11% 4124 downrated 2
wiki_modern_life 29.63 637 11% 4456 downrated 2
wiki_arts 55.80 272 11% 1983 downrated 2
wiki_society 57.63 257 11% 1943 downrated 2
wiki_linguistics 29.86 657 11% 4405 downrated 2
wiki_physical_science 32.18 546 11% 4237 downrated 2
wiki_history 54.13 244 11% 1948 downrated 2
early_modern_science 0.00 — — — 0
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 18.01 843 11% 6911 downrated 2
eu_parliament_debates 57.61 245 11% 2085 downrated 2
openstax_science 43.87 421 11% 2982 downrated 2
openstax_society 75.46 242 11% 1628 downrated 2
wpa_life_histories 1.00 7100 11% 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.