noun, noun which may take the genitive case particle 'no'
minute-by-minute; by the minute
Describes schedules, plans, or actions broken down into minute-level detail. Often used with スケジュール or 予定.
Today's schedule is planned down to the minute.
I made a minute-by-minute itinerary.
Compound of 分 (minute) and 刻み (cutting, dividing). The exact historical derivation is uncertain, but the word transparently means 'minute division'.