If you’re all about IMAX screening all eight Harry Potter movies leading up to Fantastic Beasts — an epic event that starts today, BTW — then you’ll probably want to freshen up your trivia skills, and we have just the deets you need. Though we all can swish and flick our wrists with a smooth “Wingardium Leviosa” and perhaps fix our specs in a stitch with a little “Oculus Reparo” (or at least we wish we could), those are in fact far from the most commonly used incantations in the series. Find out which take the top spots as the most used spells (as well as a spell used only once) in Harry Potter.

Harry Potter spell

Data analyst and Harry Potter fan, Skyler Johnson, decided to crunch the numbers and came up with a fancy-shmancy infographic to display her results. Each book is represented by a different color, and each dot shows which spell was used. If you hover over the dot, you’re also given info on how and when the magical move was put into action.

The least-used spell: Waddiwasi, used in Harry Potter and the Prisoner of Azkaban, which is “the incantation of a charm that can be used to shoot a small, soft mass of whatever the caster so desires at the target or victim,” according to the Harry Potter Wiki.

Hermione spell

The most used spells: Accio (a summoning charm), Expecto Patronum (a powerful defensive charm) and Stupefy (a spell that renders someone unconscious).

Happy casting, magical folks!

What magical spell do you wish you could perform? Tweet us @BritandCo!

(h/t Pop Sugar; photos via Warner Bros. Pictures)