Hertz measures cycles per second - one Hertz is one cycle per second. Unlike gauss that is a measurement unit for the strenght of a specific thing (an electromagnetic field), hertz is a generic frequency measurement.
Prepend is a word that means to attach content as a prefix. It is often used in different kinds of programming and in automated processes. Some prepending is done manually as a user. For example, a prepend command could be used in a scripting language that a programmer would enter into a certain function or code module. It would add certain characters of text to the beginning of some variable or object.
1 Put two or more words in quotes to search for a phrase: name servers. 2  Prepend a plus sign to a word or phrase to require its presence in an article: +cpanel.  Prepend a minus sign to a word or phrase to require its absence in an article: -windows.