Denshi Jisho — Online Japanese dictionary

刻々 こっこく moment by moment; hour by hour
Common word, Adverb, Adverb taking the 'to' particle 
刻々 こくこく moment by moment; hour by hour
Adverb, Adverb taking the 'to' particle 
刻々 こっこくに moment by moment; hour by hour
Adverb 

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