Base Difficulty

Base difficulty: Level 309 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: 765 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
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 85.44 1568 100% 983 3
20th_books 83.29 1725 100% 941 4
wiki_math 101.35 1893 100% 891 3
wiki_geography 224.69 1636 100% 622 4
wiki_biology 179.42 1347 100% 775 2
wiki_modern_life 236.43 1148 100% 618 3
wiki_arts 139.75 1809 100% 992 2
wiki_society 457.02 708 100% 294 4
wiki_linguistics 331.54 826 100% 394 3
wiki_physical_science 121.43 1959 100% 1157 2
wiki_history 149.18 1541 100% 911 2
early_modern_science 25.81 3765 100% 3765 1
religious_translated 64.39 1586 100% 1586 1
cooking 0.00 — — — 0
legal_scotus 174.61 1677 100% 660 4
eu_parliament_debates 332.76 639 100% 334 4
openstax_science 242.97 1238 100% 563 3
openstax_society 470.82 579 100% 291 4
wpa_life_histories 78.01 1609 100% 1049 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.