Base Difficulty

Base difficulty: Level 175 edit

Level distribution for verb (possession): 3: 3 7: 2 10: 1 20: 3 175: 14 254: 1 309: 1 314: 1 360: 1 406: 1 415: 3 455: 1 475: 3 1070: 1 1205: 1 1399: 28

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: 640 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 52.15 1696 50% 1599 4
20th_books 27.24 2678 50% 2754 downrated 3
wiki_math 304.31 618 50% 437 4
wiki_geography 43.55 1638 50% 3276 downrated 1
wiki_biology 185.45 1024 50% 748 4
wiki_modern_life 518.16 204 50% 209 downrated 4
wiki_arts 129.34 989 50% 1055 downrated 3
wiki_society 264.74 567 50% 495 4
wiki_linguistics 161.23 963 50% 783 4
wiki_physical_science 291.92 607 50% 489 4
wiki_history 66.33 1003 50% 2006 downrated 1
early_modern_science 173.33 683 50% 647 4
religious_translated 52.17 1859 50% 1769 3
cooking 264.81 558 50% 464 4
legal_scotus 840.40 178 50% 132 5
eu_parliament_debates 217.63 635 50% 518 5
openstax_science 367.81 436 50% 365 4
openstax_society 276.34 626 50% 506 4
wpa_life_histories 27.23 2504 50% 2870 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.