You can have an app, script, or command execute after a delay by adding a tilde immediately followed by a number (integer) at the end of the line. For example, to wait 5 seconds before executing an AppleScript, you would use:
* say "I've been waiting for you" ~5
The delay only applies to the line it’s on, it doesn’t delay the processing of lines after it. Anything without a delay specified will launch immediately.
You can use snippets to delay groups of items. Just put the items into a snippet file and add the tilde+number.
< example.snippets ~5
You can also put a delay on snippets that run when the Bunch closes, triggered X seconds after closing the Bunch:
!< example.snippets ~5