cheap rate

剑桥词典

the amount charged for a service that is lower than usual because there is not so much demand for the service at that time
（服務行業淡季的）促銷價，優惠價，便宜價
Cheap rate for overseas phone calls is from 8 p.m. to 8 a.m. 打國際長途的優惠時段是從晚上8點至早上8點。 返回 cheap rate