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: 336 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cambridge_yle Movers (2 of 3) 750
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 651.93 293 100% 158 5
20th_books 627.44 299 100% 166 5
wiki_math 21.94 3394 100% 3394 1
wiki_geography 299.92 657 100% 437 3
wiki_biology 158.03 1228 100% 872 2
wiki_modern_life 206.96 1258 100% 700 3
wiki_arts 390.83 577 100% 332 4
wiki_society 353.35 779 100% 383 4
wiki_linguistics 154.78 1078 100% 803 2
wiki_physical_science 95.89 2296 100% 1405 2
wiki_history 435.05 385 100% 276 3
early_modern_science 523.97 348 100% 212 4
religious_translated 1080.87 238 100% 105 5
cooking 437.21 416 100% 322 2
legal_scotus 447.07 513 100% 277 4
eu_parliament_debates 575.72 490 100% 202 5
openstax_science 145.88 2565 100% 822 4
openstax_society 479.92 668 100% 288 4
wpa_life_histories 586.86 351 100% 184 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.