淡季
a dull or slack (business) season;
a low season;
an off-season;
slack time
旺季
the peak period;
the busy season;
the rush season;
the boom season
淡季 [简明汉英词典]
a dead season
low season
off-season
slack
旺季 [简明汉英词典]
midseason
淡季a dead season,low season
旺季busy season
Off season and busy season