Spacelab module turnaround times

[Ben E]

How long did it take to turnaround a Spacelab module from one mission to the next? I'm aware that the MSL-1 module was turned around in three months, but that was exceptional and the same payload was aboard, but what of different missions?

[Jim]

there never was a pressing need so the past missions are what it was.  The modules alternated flights and it was one flight per year per module.