Frequency is the number of times a repeating event happens in a set amount of time. It is most often measured in Hertz (Hz), where one Hertz means the event happens one time each second

Frequency is the number of occurrences of a repeating event per unit of time.[1] Frequency is an important parameter used in science and engineering to specify the rate of oscillatory and vibratory phenomena, such as mechanical vibrations, audio signals (sound), radio waves, and light.

Sound is a form of energy produced by vibrations that travel as acoustic waves through a medium (solid, liquid, or gas). These vibrations cause air particles to collide and create pressure waves that travel in all directions, eventually reaching our ears where the brain interprets them as sound.

LIGHT: electromagnetic radiation of any wavelength that travels in a vacuum with a speed of 299,792,458 meters (about 186,000 miles) per second.

Electricity is the set of physical phenomena associated with the presence and motion of matter possessing an electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations. Common phenomena are related to electricity, including lightning, static electricity, electric heating, electric discharges and many others.

If you want to find the Secrets of the Universe, think in terms of Energy, Frequency, and Vibration.

Science is the intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.