The perovskites and solvents are represented by nodes along the circumference of the chord diagram. Each node sits on an arc length of the same color. The length of each arc is proportional to the frequency of occurrence of the perovskite/solvent. The ribbon-like structures (chords) connecting the two arcs are indicators of the frequency of mutual occurrences of the involved nodes. Each chord, although it appears as a single unit, is actually a sum of individual lines connecting the two concerned nodes. A chord made up of n number of lines implies n connections between the nodes. The chord diagram is constructed such that the chords emanate from perovskites and end up in solvents. To further explain the figure, let's take MAPbI3 for instance.