Concordance Rings
Where two or three roots meet across the whole Quran.

What it shows
Every surah is a ring and every ayah a tick on it. A tick lights in a root's colour where that root occurs, and becomes a meeting where every chosen root shares the same ayah.
What it is for
Frequency tables say how often a root occurs. This says where — and, for two or three roots at once, where they come together.