Freddy Green (-1987), “Mr. Rhythm”, the steady and sophisticated big band rhythm guitarist of Count Basie Orchestra for nearly 50 years. Famous for his four-to-the-bar beat accompaniment, playing a full block chord on each beat, and with clockwork precision. The pulsating sound of his comping was a defining characteristic of the Count Basie Band.
The successors of Freedie Green in Count Basie Orchestra, was Charlton Johnson (from 1987), and Will Matthews (from 1996).
The four-to-the-bar beat - strumming on every beat, often with a different chord on each beat. He played with his thumb to get a warm and rich sound.
It’s still commonly used in jazz when comping over a 12 bar blues.