The pacing at the container level does not add any delay on the requests inside the container.
The goal of the pacing is to wait until the amount of time you have configured if the execution time of your container is lower than this time.
In your case, if i understand correctly you would like put delay between the execution of your requests. You did not say if all of these requests are under the same page and if it's POST XML requests or SOAP requests.
Anyway, you can only use thinktime or delay action to reduce the speed of the requests. You can't do that with a pacing.
If you still want to use pacing then you need to put your requests under multiple containers.