“There seems to be this sort of perfect storm of interest in steampunk right now,” Mr. von Slatt said. “If you go to Google Trends and track the number of times it is mentioned, the curve is almost algorithmic from a year and a half ago.” (At this writing, Google cites 1.9 million references.)Here's the curve at Google Trends. It looks linear to me, although with a lot of noise. I suspect, though, that the speaker meant to say it was exponential (because exponentials grow really fast, so this would be in keeping with the rest of the article), then confused that with "logarithmic" (which is a pretty common mistake), and then rearranged a few letters to get "algorithmic".
And a random Google Trends fact: the number of people searching for mathematics has declined steadily over the past four years. Math has been basically flat over that time period, but shows a very large dip during the summers. Presumably the people searching for "math" are students. Maths displays what appears to be a more complicated seasonal pattern; can this be explained by the UK academic calendar. As for "mathematics" declining, I suspect people find the word too long.