Base difficulty: Level 18 edit
Level distribution for preposition (preposition_other): 6: 10 10: 7 11: 8 14: 1 18: 4 23: 2 226: 5 1080: 1 1120: 1
No difficulty overrides set. The base difficulty level will be used for all languages.
Add Difficulty Override
Tier Signals
| Source | Tier | Rank used |
|---|---|---|
cefr |
A2 (2 of 6) | 2100 |
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 |
169.97 | 583 | 100% | 583 | 1 |
20th_books |
194.35 | 544 | 100% | 544 | 1 |
wiki_math |
173.23 | 784 | 100% | 784 | 1 |
wiki_geography |
119.47 | 1151 | 100% | 1151 | 1 |
wiki_biology |
224.42 | 576 | 100% | 576 | 1 |
wiki_modern_life |
130.53 | 1107 | 100% | 1107 | 1 |
wiki_arts |
109.35 | 1258 | 100% | 1258 | 1 |
wiki_society |
96.74 | 1469 | 100% | 1469 | 1 |
wiki_linguistics |
331.05 | 384 | 100% | 384 | 1 |
wiki_physical_science |
129.52 | 1124 | 100% | 1124 | 1 |
wiki_history |
95.85 | 1385 | 100% | 1385 | 1 |
early_modern_science |
202.75 | 535 | 100% | 535 | 1 |
religious_translated |
151.75 | 719 | 100% | 719 | 1 |
cooking |
103.67 | 1116 | 100% | 1116 | 1 |
legal_scotus |
128.51 | 1012 | 100% | 1012 | 1 |
eu_parliament_debates |
28.26 | 3044 | 100% | 3044 | 1 |
openstax_science |
100.99 | 1361 | 100% | 1361 | 1 |
openstax_society |
54.56 | 2458 | 100% | 2458 | 1 |
wpa_life_histories |
199.43 | 545 | 100% | 545 | 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.