concept drift
C2CEFR level
88/100Rarity: very rare
TechnicalRegister
The gradual change in the underlying relationships a model was trained on, degrading its accuracy over time.
Post-pandemic buying patterns shifted, and concept drift quietly cut the model's precision by ten points.
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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