Let's say a group of students is speaking in front of a classroom. In the middle of their talk about a brain research, they just said ''we call this 'paralysis analysis''. After that, their teacher reacted and said:
"You are the one who coined that phrase, it already exists before you even call it that way."
Or
"You are the one who coined that phrase, it is already existing before you even call it that way."
The two sentences above I think is grammatical, but what tense should I use to clearly communicate what I am trying to say?