How to say "hourly" in Japanese

• 時々刻々じじこっこくCommon
  adverbFor 'hourly' it only covers 'from hour to hour': change unfolding moment by moment as time passes, as when describing how a situation shifts — seldom the word you want for something happening once every hour.
• 毎時まいじCommon
  noun, adverbCovers 'hourly' in the frequency sense, 'every hour': the natural choice when something happens once every hour, such as an hourly departure, or when an amount or speed is given per hour.
  ニュースは毎時まいじ放送ほうそうしています。↗

  We broadcast news on the hour.

For 'hourly' meaning once every hour, use 毎時; 時々刻々 instead paints change unfolding moment by moment as time passes, so it seldom fits schedules or per-hour amounts.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 時々刻々じじこっこくhourly
• 毎時まいじevery hour
• 一刻一刻いっこくいっこくhourly