aggregation
B2CEFR level
45/100Rarity: uncommon
TechnicalRegister
The combining of individual data points into summary figures.
At the daily aggregation the anomaly disappeared, so they had to drill into hourly data to find it.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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