Their arguments were becoming more and more frequent. 他们的争论变得越来越频繁。
frequent contact The President is in frequent telephone contact with the German Chancellor. 总统和德国总理保持着经常的电话联系。
at frequent intervals (=regularly) Inspections must be carried out at frequent intervals. 定期地
He was a frequent visitor to our house. 他是我们家的常客。