Base Difficulty

Base difficulty: Level 1399 edit

Level distribution for noun (linguistic_concept): 280: 2 329: 4 1110: 23 1120: 2 1399: 25

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: 5818 (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 8.36 2835 14% 10066 downrated 2
20th_books 4.03 4417 14% 17247 downrated 2
wiki_math 30.27 840 14% 4130 downrated 2
wiki_geography 15.51 2335 14% 8940 downrated 2
wiki_biology 16.58 1890 14% 8170 downrated 2
wiki_modern_life 21.41 1931 14% 6941 downrated 2
wiki_arts 32.92 1181 14% 4170 downrated 2
wiki_society 40.52 793 14% 3323 downrated 2
wiki_linguistics 82.45 335 14% 1541 downrated 2
wiki_physical_science 18.60 2089 14% 7658 downrated 2
wiki_history 27.60 1227 14% 4841 downrated 2
early_modern_science 12.74 2427 14% 8600 downrated 2
religious_translated 9.31 1560 14% 10400 capped 1
cooking 28.65 999 14% 3965 downrated 2
legal_scotus 11.27 2430 14% 9875 downrated 2
eu_parliament_debates 11.22 1995 14% 8610 downrated 2
openstax_science 0.00 — — — 0
openstax_society 12.27 2488 14% 10382 downrated 2
wpa_life_histories 10.39 2261 14% 8120 downrated 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.