Anders has a tutorial on strumming 16th note subdivisions in the Acoustic course.
https://www.guitartricks.com/lesson/29256
There is also this one from the rock course.
https://www.guitartricks.com/lesson/19993
Hope that helps!
edited
Anders has a tutorial on strumming 16th note subdivisions in the Acoustic course.
https://www.guitartricks.com/lesson/29256
There is also this one from the rock course.
https://www.guitartricks.com/lesson/19993
Hope that helps!