cohort
B2CEFR level
50/100Rarity: uncommon
TechnicalRegister
A group of customers sharing a common characteristic, such as acquisition month, tracked over time.
Cohort analysis showed that users acquired through referrals retained far longer than paid ones.
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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