Therefore, I must narrow my search with better keywords, Memo Writing, for example, to improve my chances of finding the appropriate information. You are shopping for a computer, and the salesperson tells you 300 megahertz is better than 200 megahertz. Megahertz simply measures electricity flow through wires with those bits and bytes. Those 1's and 0's as part of the computer memory move quickly until they encounter some data not on the line. At this point you should be questioning the salesperson about a systems bus for that slowing of the data.
Hertz refers to wave lines.
Your lines may be more undulating with faster megahertz. The next time you have to purchase a computer, ask the salesperson to explain the systems bus rather than giving you all the details about megahertz. Megahertz of 300 is not necessarily better than 200. You need to weigh other factors. Faster is not necessarily better.