range limit slider on frequency widget

[jtauber]

Would be nice if frequency widget had a slider with min / max knobs and only words in that frequency range were colored. The slider could also act as the color legend.

[jtauber]

One thing that has to be considered here is how this will work if the heat map display is broken out from the frequency annotation.

I guess it's still the case that the range limit slider is applicable for anything you use the heat map for, not just frequency.