Base Difficulty

Base difficulty: Level 23 edit

Level distribution for adverb (location): 18: 4 23: 22 250: 13 1070: 1 1120: 5 1205: 1 1221: 1 1399: 2

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: 1376 (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 Movers (2 of 3) 750
cefr B1 (3 of 6) 4200

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 212.51 284 20% 459 downrated 3
20th_books 159.80 379 20% 595 downrated 3
wiki_math 37.54 1289 20% 2396 downrated 2
wiki_geography 169.56 146 20% 625 downrated 2
wiki_biology 80.15 283 20% 1415 downrated 1
wiki_modern_life 52.93 445 20% 2225 downrated 1
wiki_arts 42.88 585 20% 2925 downrated 1
wiki_society 28.24 956 20% 4780 downrated 1
wiki_linguistics 30.54 871 20% 4355 downrated 1
wiki_physical_science 129.93 268 20% 959 downrated 2
wiki_history 71.38 300 20% 1500 downrated 1
early_modern_science 271.19 215 20% 410 downrated 3
religious_translated 107.40 366 20% 901 downrated 3
cooking 11.27 1654 20% 5200 capped 1
legal_scotus 9.15 2523 20% 12615 downrated 1
eu_parliament_debates 10.94 1932 20% 9660 downrated 1
openstax_science 88.96 553 20% 1470 downrated 2
openstax_society 29.16 971 20% 4855 downrated 1
wpa_life_histories 181.83 195 20% 568 downrated 3

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.