Base Difficulty

Base difficulty: Level 460 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: 250 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cambridge_yle Flyers (3 of 3) 1200
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 443.26 427 100% 220 5
20th_books 393.65 476 100% 257 4
wiki_math 1126.01 174 50% 117 4
wiki_geography 727.20 171 50% 160 4
wiki_biology 426.29 383 50% 307 4
wiki_modern_life 483.16 313 50% 260 4
wiki_arts 699.89 227 50% 166 4
wiki_society 644.27 215 50% 185 4
wiki_linguistics 1304.59 123 50% 94 4
wiki_physical_science 518.21 404 50% 273 4
wiki_history 771.97 136 50% 136 4
early_modern_science 475.37 427 50% 238 4
religious_translated 641.67 341 100% 167 5
cooking 391.01 592 50% 299 4
legal_scotus 420.25 581 50% 308 4
eu_parliament_debates 370.20 443 50% 305 5
openstax_science 541.53 280 50% 241 4
openstax_society 509.06 291 50% 255 4
wpa_life_histories 301.61 690 50% 331 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.