How much time does it take to review an item?

I have uploaded my script yesterday and it says 4th out of 4 scripts and 20th out of 45. What does it mean? How long will it take to review? Thanks in advance

They take maximum 7days for review an item

It been more than 8 days our item still under review. Seems it will take more than 2-3 week to review a item.