stratification
C1CEFR level
70/100Rarity: rare
TechnicalRegister
The division of a population into sub-groups so that each can be tested at an appropriate level of scrutiny.
Stratification of the debtor ledger isolated the few large balances that warranted individual confirmation.
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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