Base Difficulty

Base difficulty: Level 145 edit

Level distribution for verb (directional_movement): 5: 6 23: 4 26: 3 28: 2 120: 1 135: 2 145: 5 210: 1 254: 1 300: 1 330: 2 415: 1 460: 1 470: 9 1040: 1 1050: 2 1120: 1 1399: 18

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: 335 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 845.61 213 80% 128 4
20th_books 879.18 181 80% 130 4
wiki_math 208.59 891 79% 579 3
wiki_geography 174.00 1165 79% 791 3
wiki_biology 230.88 774 79% 578 4
wiki_modern_life 349.51 562 79% 386 4
wiki_arts 290.60 915 79% 467 4
wiki_society 202.75 811 79% 660 3
wiki_linguistics 114.60 1179 79% 1091 2
wiki_physical_science 184.69 913 79% 755 3
wiki_history 310.86 603 80% 412 3
early_modern_science 338.32 760 80% 337 4
religious_translated 459.83 431 79% 234 4
cooking 1316.67 114 79% 109 4
legal_scotus 253.79 699 79% 484 4
eu_parliament_debates 177.64 929 79% 594 4
openstax_science 285.93 687 79% 475 4
openstax_society 310.99 717 79% 444 4
wpa_life_histories 459.07 407 80% 232 4

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.