This is the 2287th most frequent Japanese word.
頻繁
Frequent.
Here, '頻繁' is used to describe the regular occurrence of the action of visiting the café. It adds a sense of often or repeatedly.
彼は頻繁にこのカフェに通っています。
He frequently visits this café.
In this case, '頻繁' expresses the increasingly common occurrence of rain, denoting frequencies in weather patterns.
最近、頻繁に雨が降っています。
Recently, it has been raining frequently.
'頻繁' here emphasizes the regularity or recurrence of accidents in this specific location, suggesting a notable pattern.