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Effective

/ɪˈfektɪv/

Something that produces a desired or intended result

Synonyms:

It is a simple but effective ruse.'The secret to effective time management is.What makes pomodoro so effective?

from Latin effectivus ‘creative, effective’, from effectus ‘accomplishment’, from efficere ‘work out, accomplish’

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Often

Hint: Frequency according to COCA