But why would that matter if they're just graphing the number of searches for the term? Is Trends displaying the result of an algorithm for term popularity and

But why would that matter if they're just graphing the number of searches for the term? Is Trends displaying the result of an algorithm for term popularity and not just number of searches? I know these are also skewed because of other reasons people would search for these terms (ie, "ruby", "python", "java", or "arc"). But the graph of a term that's unlikely to be confused with something else ("Ruby on Rails") seems to make sense in terms of what the number of searches ought to be.