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!