```
\begin{tikzpicture}[remember picture, overlay]
\node<6>[xshift=-3.5cm, yshift=0.5cm] (b) [N]
at (current page.east)
{$\bm{f_{-a}}$ is the frequency array without the token $a$\\test};
\draw<6>[-Stealth, shorten <=1mm, shorten >=1mm, dashed]
(pic cs:bar) to [bend left] (b.south);
\end{tikzpicture}
```