Question Re. Density Graph

Can someone explain to me how come the numbers associated with the Density Graph for the Lemma is different/varies when compared to the Translation Density Graph, PLEASE? When I make a statement such as, “the greek word X is used so many times in the NT” I want to be accurate. Why are the numbers different in the Translation Density Graph when I change Bible Version, i.e. under Settings I go from ESV, to NIV, to NLT etc. and the Density Graph changes!