how long motorcycle bike has been stayed there, how to say this in a noun

A natural noun phrase is “the bike’s duration there” or “its stay there”. If you want it to sound more polished, “the length of time the motorcycle has been there” is the clearest form.

Better noun options

• Stay : “the bike’s stay there.”
• Duration : “the duration of the motorcycle’s stay.”
• Time parked : “the bike’s parked time.”
• Length of stay : “the length of the motorcycle’s stay there.”

Most natural choice

For everyday English, “how long it has been parked there” is the most natural wording, while “the bike’s stay” or “the duration of its stay” works when you specifically want a noun.

Example

• “I’m not sure about the duration of the bike’s stay there.”
• “Do you know how long it has been parked there?”