“屡次”常见的英文表达有 repeatedly、again and again、time and again 或 frequently（侧重频率高但程度稍弱于前几个词）。具体用法如下：
1、 repeatedly
释义：强调多次、重复地发生，语气稍正式。
例句：
He has repeatedly failed to meet the deadline.（他屡次未能按时完成任务。）
2、 again and again / time and again
释义：口语化表达，强调反复发生，适合日常对话。
例句：
She has warned him again and again, but he still makes the same mistake.（她屡次警告他，但他还是犯同样的错误。）
3、 frequently
释义：侧重频率高，但语气比前几个词稍弱，可替换“often”。
例句：
The machine frequently breaks down.（这台机器屡次出故障。）
选择建议：正式场合或书面语优先用 repeatedly 或 time and again。
口语或强调重复性时可用 again and again。
单纯描述频率高时，frequently 更简洁。