Base Difficulty

Base difficulty: Level 145 edit

Level distribution for verb (directional_movement): 5: 6 23: 4 26: 3 28: 2 120: 1 135: 2 145: 5 210: 1 254: 1 300: 1 330: 2 415: 1 460: 1 470: 9 1040: 1 1050: 2 1120: 1 1399: 18

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: 266 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 282.26 617 99% 336 4
20th_books 294.01 602 99% 333 4
wiki_math 399.62 972 99% 321 4
wiki_geography 897.23 176 99% 124 4
wiki_biology 516.71 587 99% 261 4
wiki_modern_life 717.34 402 99% 169 4
wiki_arts 732.44 309 99% 160 4
wiki_society 777.27 308 99% 154 4
wiki_linguistics 331.68 714 99% 384 4
wiki_physical_science 765.97 377 80% 181 4
wiki_history 1191.93 118 99% 84 3
early_modern_science 385.83 499 80% 288 4
religious_translated 423.90 627 99% 249 4
cooking 0.00 — — — 0
legal_scotus 217.51 1370 80% 544 5
eu_parliament_debates 401.58 677 80% 283 5
openstax_science 655.44 387 80% 207 4
openstax_society 881.21 261 99% 142 5
wpa_life_histories 240.35 1027 80% 406 4

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.