"over in the blink of an eye"? What is the idiom "in the blink of an eye" in Japanese? I want to use it to say that two years will be over in the blink of an eye or "before you even notice". (For a detailed discussion and examples of the English idiom please see e.g. here)

{} is the phrase I would suggest.

"Two years will be over in the blink of an eye." would be:

2{}

2{}

Needless to say, literally means "while you utter ". It is a **_very_** common and useful phrase for "in the blink of an eye".