Is low pass filter more commonly used than high pass filter?
So, my question is - Is low pass filter more often used than high pass filter? Is there any reason for this or is a false claim?


It's neither a true claim, nor a false one. It is irrelevant to the understanding of filters. It is also poorly posed, what exactly do you count as a filter?

It might be possible somehow to count all filters used in the world, and come up with two numbers, and decide which was biggest. And when you'd done that exercise, you'd still understand no more about filters.

A filter is used when you need the energy in part of the spectrum to be reduced for some reason. Often that part is down at low frequency, where DC offsets, 1/f noise, drifts, mains hum are unwanted. Often that part is up at high frequency, where broadband noise, aliasing signals, radio reception on unshielded wires are unwanted. As an engineer, you will be called to design and deploy many of each type.