As you know there are two types of integration flows that are supported on platform - polling tasks and webhooks (see this article for more information). Polling tasks are the once that are automatically run by the platform on a configurable interval (e.g. every 3 minutes) by a centralised component called scheduler.

Please note that polling/scheduled integration flows may be switched to a realtime mode - in the realtime mode containers of the polling tasks won't be shut-down between the runs but scheduling will happen as usual.