Base Difficulty

Base difficulty: Level 20 edit

Level distribution for noun (means_of_payment): 20: 5 184: 1 1399: 3

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: 589 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cambridge_yle Flyers (3 of 3) 1200
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 311.73 334 100% 334 1
20th_books 436.45 263 100% 263 1
wiki_math 17.32 3953 100% 3953 1
wiki_geography 48.64 2817 100% 2817 1
wiki_biology 0.00 — — — 0
wiki_modern_life 88.88 1658 100% 1658 1
wiki_arts 137.76 975 100% 975 1
wiki_society 297.29 383 100% 383 1
wiki_linguistics 29.56 3498 100% 3498 1
wiki_physical_science 0.00 — — — 0
wiki_history 192.64 663 100% 663 1
early_modern_science 50.50 2193 100% 2193 1
religious_translated 76.26 1353 100% 1353 1
cooking 45.07 1894 100% 1894 1
legal_scotus 231.33 551 100% 551 1
eu_parliament_debates 362.28 335 100% 335 1
openstax_science 20.78 4967 100% 4967 1
openstax_society 647.33 172 100% 172 1
wpa_life_histories 972.27 134 100% 134 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.