I want to add timeblocks of 90 min starting from 9.30… but how?

I want to set the workinghours to these blocks:

09.30 to 11.00

11.00 to 12.30

13.00 to 14.30

14.30 to 16.00

19.00 to 20.30

20.30 to 22.00

But how can I get that?

I know about the Break Hours…

Thnx!