The phrase "most repeatedly" can be replaced with synonyms like "most frequently", "most often", "most commonly", "most regularly", "most recurrently", "most habitually", "most persistently", "most consistently", or "most relentlessly". Each of these words emphasizes the idea of something happening repeatedly or repeatedly happening more than anything else. Depending on the context, one synonym may be more appropriate than others. However, all of these synonyms can be used to convey the idea of something happening with great regularity or frequency. Using synonyms can make writing more interesting and varied.