The three general types of media schedules are

My answer -

Three general types of media schedule :
1. Continuous schedule – advertising runs at a constant level with little variation throughout the campaign period
2. Flighting schedule – advertisements run for set periods of time, alternating with periods in which no ads run
3. Pulsing schedule – combines continuous and flighting schedules: during the entire campaign, a certain portion of advertising runs continuously, and during specific time periods of the campaign, additional advertising is used to intensify the level of communication with the target audience

And if you need anything else on let me know :)