0
Inning is a noun.
There is 3 outs in the bottom of each inning and 3 outs in the top of each inning so there are 6 total outs in each inning.
The inning is the term of service in badminton.
In total there are 6 outs in an whole inning but each half inning only has 3 outs.
3 outs end an inning