MAPbI3 is associated with purple color in the figure, which means, it is represented by the purple node and its connections are represented by the purple chords. The purple arc acts as a base for these purple chords to emerge from and connect to the solvents. The length of this purple arc seems to be the biggest of all, which reflects the maximum mentioning of MAPbI3 in the literature. The purple chords coming out from MAPbI3 end up in all the solvents. This means, MAPbI3 has been synthesized using all these solvents and their frequency of usage is given by the thickness of the corresponding chords. Since the chord connecting DMF appears to have maximum thickness, one can safely assume that DMF is the mostly used solvent for MAPbI3. One can also gain an insight on the usage distribution of these solvents by examining their arc length occupied by these purple chords. For example, the chords occupy less than 50% of the arc lengths of DMF and Isopropanol while they occupy 50% or more in case of Ethanol and DMSO (refer Figure ). This means, compared to DMF and Isopropanol, the percentage usage of Ethanol and DMSO is more on the synthesis of MAPbI3 while the higher associations of MAPbI3 with DMF could simply be a result of wider use of DMF. To generalize, this implies that although two chords may have same thickness, they may not carry the same significance for the concerned association. The thickness of the purple chord is comparable for Ethanol, Isopropanol, and Toluene but the proportion of arc length they occupy is quite different, thereby reflecting how often that solvent is used in the synthesis of MAPbI3.