Base Difficulty

Base difficulty: Level 10 edit

Level distribution for noun (place_name): 1: 1 10: 1 24: 6 26: 1 114: 2 115: 2 219: 1 249: 1 255: 5 278: 3 299: 1 405: 6 406: 1 1078: 11 1203: 3 1204: 3 1207: 1 1210: 1 1212: 1 1221: 4 1222: 1 1399: 1

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: 965 (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 Starters (1 of 3) 325
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 185.93 585 100% 518 2
20th_books 280.59 423 100% 361 2
wiki_math 0.00 — — — 0
wiki_geography 118.49 2162 100% 1178 2
wiki_biology 189.42 1256 100% 736 2
wiki_modern_life 128.81 2112 100% 1147 2
wiki_arts 106.05 2203 100% 1299 2
wiki_society 0.00 — — — 0
wiki_linguistics 0.00 — — — 0
wiki_physical_science 0.00 — — — 0
wiki_history 28.91 4423 100% 4423 1
early_modern_science 106.69 1977 100% 1056 2
religious_translated 104.91 1744 100% 936 2
cooking 61.98 1554 100% 1554 1
legal_scotus 0.00 — — — 0
eu_parliament_debates 0.00 — — — 0
openstax_science 0.00 — — — 0
openstax_society 0.00 — — — 0
wpa_life_histories 129.96 938 100% 748 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.