We do not support the "drip feed" content model as a feature, but we do have various ways to encourage paced progress.
Encourage progress with scheduled cohorts
On the Complete Plan and above, you can publish as many cohorts as you like once you build the Master, so you could offer a scheduled cohort periodically, such as every month or quarter. Your students would just need to join the next available class in order to take it on a schedule. You can restrict access to individual lessons and steps with start dates.
Encourage progress with structure and check-ins
Alternately, you can set up a self-paced class in such a way as to encourage your learners to stay on a personal schedule: for example, title each module as a new "Week" and require regular personal check-ins via video chat or email.
Encourage progress with personal encouragement
You can see where any learner is at any time using the activity feed on the Dashboard or by using the View Learners screen within the course. If you see someone falling behind, you can personally email that learner to see if they need help.
Release content periodically
One way to release content periodically is by setting password locks on steps. If you wanted to do something similar to a drip feed, you could manually send out a new password periodically to control access to content that way. You can publish new material as you go with learners enrolled in the course, but we'd recommend building out the full course structure and locking future steps so that learners can see that they have unfinished content ahead of them.
Learners do not automatically receive notifications when new content is published or unlocked, so you may want to manually send the class a message when this happens.