Thought I'd look at his numbers for this season. He's played just 466 minutes in all comps this season and has 2 goals and 2 assists.
So hes been involved in a goal every 116.5 minutes or every 1.29 games.
In comparison :
Kulusevski - Involved every 2.7 games
Son - Involved every 1.2 games
Perisic - Involved every 0.9 games
Solomon - Involved every 1.5 games
Par then pretty much.