It makes sense to schedule your Adworks campaigns to pause on days of the week and/or hours of the day that are not relevant to your business. For example, your company is B2B and your target audience tend to work office hours (8am-6pm) Monday through to Friday. By pausing your ads so they do not show out side of these times you can save up to approximately 20% of your total ad cost. Clicks outside these hours tend to be irrelevant and close phrase-matching variants of keyword searches.
This next bit is important.
First of all you need to switch your Adwords campaign from “Standard” to “All Features” as shown below. The Ad Scheduling feature doesn’t show up when the campaign is set to standard. Google loves to hide features like this (fair but not fair :-/)
After that go to Settings and you will now see a tab called “Ad Scheduling”. Click on this and then create a new ad schedule.
I hope this helps.