[iktorn]

not really - there is a subtle difference

[cruise02]

Aren't they both asking "What technology has been relevant for the past 5 years?" Maybe I just need an example that answers one question but not the other?

[kenjackson]

The answer to both questions would be the same. Although the way the question is phrased may get one to the answer faster or slower.

[woogley]

think of it as "peaks" of relevance