[Plugin: WP-Crontrol] Understanding WP-Control

First off thanks for making this plugin available. I came across it
because my shared host recently has been shutting down my site because
I’m overloading their servers’ CPU. After investigating I found that
it was my wordpress wp-cron that was causing this chaos.
I’m hoping you can help shed some light on your plugin and how it
interacts with the wp-cron.php file.
I’ve loaded your plugin, have it working but just want to make sure I
understand a few things first.

1. If the wp-cron gets loaded every time someone hits my site, and
say I get 2 hits within 1 minute of each other, wouldn’t the set
intervals (see attachment) run kind of over-laping each other?
2. If this is not the case, what would be a good interval to set
based on my attached screenshot?

If you could help that would be great.
My host has shut my site down 3 times in the past week, and I’m
getting a bit frustrated.

Cheers,
Jake

http://wordpress.org/extend/plugins/wp-crontrol/