It probably just increments by some fixed amount each second, but it seems like ...

raylu · on March 1, 2013

From the beautified app.min.js:

    function a() {
        e = e || Q("number_of_seconds");
        d = d || Q("searches_count_num");
        f = f || Q("searches_count_unit");
        var a = ~~ (((new Date).getTime() - h) / 1E3 % 86400),
            k = a * b + "";
        f.innerHTML = " " + c[Math.ceil(k.length / 3)] || "";
        e.innerHTML = a;
        d.innerHTML = k.replace(/(\d)(?=(\d\d\d)+(?!\d))/g, "$1,")
    }
    var b = ~~ (1E11 / 2592E3),

So yes.