Quantifying stropping in terms of laps can be difficult because of differences in technique and differences among strops.

I'm presently using 30 laps on linen and then at least 60 laps on Premium I leather on my paddle strop. The paddle strop is a good strop for beginners to start with, but my experience has been that it requires more laps. The linen seems to bring the edge into sharpness quicker than leather, but the leather then goes on to refine that edge nicely.