Three times?

Currently in the middle of the AoL and it’s the scene when Tiallume, the butler, tries to assassinate Wax, Wayne and Marasi. After they escape these exact lines are said: “His mind was still trying to catch up. Tillaume—a man who, as far as he knew, had served his uncle faithfully for decades—had tried to kill him. Three times" What does he mean by “three times?” Is it something already been said in the book and I simply hadn’t understood it or a RAFO?