That would be called an associate degree
“Constance Culmington, he reflected to himself, was exactly the sort of woman who would buy an island and surround herself with mystery! Nodding his head in gentle approval of his logic, Mr. Justice Wargrave allowed his head to nod... He slept..." Chapter 1, pg. 3
Rhythm is a patterned repetition of a motif, formal element, etc., at a regular or irregular intervals in the same or modified form.