Question

to differentiate pitch and frequency

Answer 1

Pitch is the subjective property of sound wave , because a sound may be shrill to you but grave to other. It depends on person to person....

But frequency is measurable quantity of sound wave that determines pitch.

Answer 2

pitch is precept of a sound and can only be measured subjectively, often you ask people to adjust one sound that is pitch

it is a number of vibration produced by a vibrating body in one second