Base Difficulty

Base difficulty: Level 22 edit

Level distribution for adverb (relative_time): 6: 3 9: 3 22: 5 225: 9 1030: 1 1399: 4

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: 462 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cambridge_yle Flyers (3 of 3) 1200
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 77.47 666 50% 1204 downrated 2
20th_books 132.20 425 50% 766 downrated 2
wiki_math 165.73 419 50% 838 downrated 1
wiki_geography 368.36 142 50% 275 downrated 2
wiki_biology 219.73 252 50% 504 downrated 1
wiki_modern_life 302.93 155 50% 310 downrated 1
wiki_arts 596.98 75 50% 148 downrated 2
wiki_society 352.20 130 50% 260 downrated 1
wiki_linguistics 293.97 203 50% 406 downrated 1
wiki_physical_science 208.21 310 50% 620 downrated 1
wiki_history 875.32 49 50% 98 downrated 1
early_modern_science 86.76 719 50% 1257 downrated 2
religious_translated 32.81 1557 50% 3114 downrated 1
cooking 20.28 2019 50% 4038 downrated 1
legal_scotus 171.12 362 50% 688 downrated 2
eu_parliament_debates 83.72 1072 50% 1376 downrated 2
openstax_science 169.56 372 50% 744 downrated 1
openstax_society 263.52 213 50% 426 downrated 1
wpa_life_histories 262.84 238 50% 456 downrated 2

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.