Parenting Baby to Sleep

Routine
1. a customary or regular course of procedure.
2. commonplace tasks, chores, or duties as must be done regularly or at specified intervals; typical or everyday activity: the routine of an office.
3. regular, unvarying, habitual, unimaginative, or rote procedure.

Schedule
1. a plan of procedure, usually written, for a proposed objective, esp. with reference to the sequence of and time allotted for each item or operation necessary to its completion: The schedule allows three weeks for this stage.
2. a series of things to be done or of events to occur at or during a particular time or period: He always has a full schedule.
3. a timetable.

I’ve put these to definitions up so people can understand what I mean about the difference between the two.
If we look at “Baby trainers” they use schedules and work by the clock.
Routine is more along the lines of: one thing leads to another.