The duration of a musical sound or silence assigned to the beat unit and all other durations of musical sounds and silences proportionately related to that beat unit.
Tempo – “speed”
The relative fast or slow speed at which the beat is perceived.
Meter – “recurrence”
The grouping of beats into recurring patterns.
Rhythm – “combination”
The combination of various durational values.
To find out the absolute duration of a sound or a silence in music, you need to look at
the tempo markings,
the time/meter signature (the notation of the meter), and