Base Difficulty

Base difficulty: Level 219 edit

Level distribution for noun (path_infrastructure): 24: 1 26: 8 115: 2 135: 1 219: 3 255: 9 405: 2 1020: 2 1050: 1 1399: 10

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: 7848 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr A2 (2 of 6) 2100

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 7.71 2482 17% 10603 downrated 2
20th_books 11.71 2009 17% 7226 downrated 2
wiki_math 2.89 3982 17% 8000 capped 1
wiki_geography 7.12 3205 17% 9000 capped 1
wiki_biology 0.00 — — — 0
wiki_modern_life 42.65 761 17% 3258 downrated 2
wiki_arts 21.47 1626 17% 6401 downrated 2
wiki_society 4.21 4994 17% 11000 capped 1
wiki_linguistics 0.00 — — — 0
wiki_physical_science 5.77 3619 17% 8000 capped 1
wiki_history 7.78 2919 17% 9000 capped 1
early_modern_science 10.00 2670 17% 10215 downrated 2
religious_translated 2.52 4933 17% 10400 capped 1
cooking 0.00 — — — 0
legal_scotus 3.81 5869 17% 19194 downrated 2
eu_parliament_debates 5.29 2815 17% 11000 capped 1
openstax_science 12.26 1857 17% 11000 capped 1
openstax_society 6.61 3129 17% 11000 capped 1
wpa_life_histories 18.19 1678 17% 5242 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.