Every sixty minutes is a commonly used phrase to indicate an hourly occurrence, but there are a few synonyms that can be used interchangeably. One such synonym is 'hourly', 'per hour' or 'each hour'. Another option is to use the phrase '60-minute intervals' or 'once every hour'. When wanting to communicate the frequency of an event that happens every hour, one could choose to use 'hour after hour' or 'regularly scheduled hourly'. Although each of these phrases varies slightly, they all effectively signify an event that happens every sixty minutes. It is important to vary the language used in writing to keep the reader interested and engaged.