How do frequency dependent capacitors work?

When the frequency applied to the capacitor increases, the effect is to decrease its reactance (measured in ohms). A capacitor conjoined to a circuit that changes over a given range of frequencies would be denoted as "frequency dependent."

As the frequency multiplies, the capacitor passes more charge across the plates during a given time resulting in a more substantial current flow through the capacitor approaching as if the internal impedance of the capacitor has diminished. Therefore, a capacitor linked to a circuit that changes over a given range of frequencies can be frequency dependent. As frequency applied to capacitor increases, it’s effect will decrease.