Note: starting Oct 10th, 2017 Periodic Jobs is a feature available only to Scrapy Cloud paid plans.
You can configure a Periodic Job to run a spider at specific intervals. To add a periodic job navigate to the project and click the Periodic Jobs link on the left sidebar.
On the Periodic Job page click on "Add periodic job". Then provide the details as when the job should run, Like in the below example, the spider is being set to run every Thursday at 3.00 UTC time.
You can provide the Tags and Arguments that should be used to launch the job.
For a case where you want to run a job every 5 hours then you would have to create multiple Periodic Jobs for same spider where the Time difference would be 5 hours. Like in below example the job is scheduled to run every 5 hours on every Monday.