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: 854 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
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 181.71 550 100% 550 1
20th_books 189.52 557 100% 557 1
wiki_math 0.00 — — — 0
wiki_geography 242.23 513 100% 513 1
wiki_biology 469.05 230 100% 230 1
wiki_modern_life 75.14 1969 100% 1969 1
wiki_arts 52.20 2641 100% 2641 1
wiki_society 53.41 2608 100% 2608 1
wiki_linguistics 72.01 1764 100% 1764 1
wiki_physical_science 188.76 763 100% 763 1
wiki_history 72.96 1868 100% 1868 1
early_modern_science 196.68 551 100% 551 1
religious_translated 22.07 3769 100% 3769 1
cooking 40.57 2005 100% 2005 1
legal_scotus 67.80 1843 100% 1843 1
eu_parliament_debates 281.22 440 100% 440 1
openstax_science 152.52 935 100% 935 1
openstax_society 139.72 1010 100% 1010 1
wpa_life_histories 443.90 274 100% 274 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.