What consist(s) of a series of related instructions that tells the computer what to do and how to do it

Software program.

Explanation:

Unlike hardware which describes physical entities of a computer, a software program or simply a program (or even simply, a software) is a set of instructions or data that commands the computer on specific tasks to be performed and how they (the tasks) are performed.  Examples of a software are internet browser applications such as Google Chrome, Internet Explorer, and Mozilla Firefox and graphics applications such as Photoshop and Corel Draw.

Hope this helps!

the answer to your question would be something called hertz. the unit of measurement called a hertz, which is one cycle per second, is used to measure clock speed. within one cycle, your computer processes, refreshes, or updates itself to the changes that it is going through. in the case of computer clock speed, one hertz equals one tick per second. the clock speed of computers is usually measured in megahertz (mhz) or gigahertz (ghz)