Bubbly Dance 2 and Evade Window

[Jaevwyn]

Hi,
Both Bubble Dance 2 and Evade Window have the effects of more i-frames, wondering approximately how much Evade Window is Bubbly 2 giving us, do the effects of evade window and bubbly stack and is there a cap of how much these stack? (like Constitution and Dash Juices for example)