Hopefully "a while" is not too long.
If you look at his
injury history, he's missed 244 days in the last 4 seasons (excluding the current season), which works out to 61 days a year. Last year he only missed 11 games through injury, and that's including the big injury he got at the end.
That's about 2 months, or roughly 10-20 games missed a season, assuming that injury time includes getting back up to match fitness.
If he keeps that up, it's not too bad. We have plenty of depth at midfield to afford him missing 10 or 20 games a season, assuming he does what he has the ability to do in the other 40-50.