Base Difficulty

Base difficulty: Level 1399 edit

Level distribution for verb (social_interaction): 1399: 21

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: 3913 (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 3.32 5834 17% 19509 downrated 2
20th_books 1.58 6479 17% 20000 capped 1
wiki_math 49.52 511 17% 2420 downrated 3
wiki_geography 27.41 807 17% 4842 downrated 1
wiki_biology 59.93 361 17% 1992 downrated 2
wiki_modern_life 42.22 470 17% 2820 downrated 1
wiki_arts 42.38 462 17% 2772 downrated 1
wiki_society 78.63 237 17% 1343 downrated 2
wiki_linguistics 37.37 598 17% 3588 downrated 1
wiki_physical_science 72.58 293 17% 1758 downrated 1
wiki_history 35.16 890 17% 3718 downrated 3
early_modern_science 12.02 1599 17% 9594 downrated 1
religious_translated 9.31 2946 17% 9362 downrated 2
cooking 0.00 — — — 0
legal_scotus 17.37 1871 17% 5544 downrated 3
eu_parliament_debates 10.48 1738 17% 10428 downrated 1
openstax_science 73.10 255 17% 1530 downrated 1
openstax_society 63.53 356 17% 1944 downrated 2
wpa_life_histories 3.77 5097 17% 14813 downrated 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.