Base Difficulty

Base difficulty: Level 1030 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: 1396 (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 5.27 9855 100% 9855 1
20th_books 16.41 4434 100% 4434 1
wiki_math 86.62 1380 100% 1380 1
wiki_geography 186.69 686 100% 686 1
wiki_biology 128.45 1098 100% 1098 1
wiki_modern_life 146.85 952 100% 952 1
wiki_arts 229.61 531 100% 531 1
wiki_society 145.19 927 100% 927 1
wiki_linguistics 117.16 1115 100% 1115 1
wiki_physical_science 164.66 883 100% 883 1
wiki_history 341.16 323 100% 323 1
early_modern_science 19.74 4588 100% 4588 1
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 24.89 3919 100% 3919 1
eu_parliament_debates 29.54 2948 100% 2948 1
openstax_science 177.05 808 100% 808 1
openstax_society 197.18 720 100% 720 1
wpa_life_histories 21.06 3717 100% 3717 1

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.