Base Difficulty

Base difficulty: Level 249 edit

Level distribution for adverb (direction): 10: 2 249: 6 1020: 1 1120: 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: 4304 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 8.52 2081 20% 10405 downrated 1
20th_books 8.16 2117 20% 10585 downrated 1
wiki_math 0.00 — — — 0
wiki_geography 195.04 97 20% 485 downrated 1
wiki_biology 33.63 806 20% 4030 downrated 1
wiki_modern_life 11.64 2521 20% 10000 capped 1
wiki_arts 19.29 1446 20% 7230 downrated 1
wiki_society 10.43 2687 20% 11000 capped 1
wiki_linguistics 29.24 903 20% 4515 downrated 1
wiki_physical_science 22.84 1286 20% 6430 downrated 1
wiki_history 48.53 479 20% 2395 downrated 1
early_modern_science 36.60 596 20% 2980 downrated 1
religious_translated 18.81 1095 20% 5475 downrated 1
cooking 0.00 — — — 0
legal_scotus 1.34 8603 20% 20000 capped 1
eu_parliament_debates 4.50 3475 20% 11000 capped 1
openstax_science 11.22 2324 20% 11000 capped 1
openstax_society 18.52 1497 20% 7485 downrated 1
wpa_life_histories 32.13 660 20% 3300 downrated 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.