airwaves
noun [ plural ] uk/ˈeə.weɪvz/ us/ˈer.weɪvz/
（广播、电视用的）无线电波;播送时间
the radio waves used for broadcasting radio and television programmes, or, more generally, radio or television broadcasting time
The new series will be on the airwaves at 6 p.m. every Tuesday. 新拍的系列片将在每周二的下午6点播出。