How to identify a cliche: the end of a dilemma

A cliche is an expression which is overused, and has been shorn of its original impact in the process. How can one judge when meeting an expression for the first time?

Searching for the words via the search engine of your choice allows an evaluation of the frequency of occurrence.For instance, the words 'technological marvel' - search and pages and pages of references come up.End of dilemma.

Is this obvious? I searched under 'identifying a cliche' and no one mentioned this method. Could everyone be doing this and not writing about it?

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In fact, it is often enough for me to wonder whether I should check, to be practically sure that the expression is a cliche.