Using Wait Step Work Items 
The workflow system creates wait step work items when wait steps are executed. A wait step work item is not set to the status completed until the number of events specified in the definition has occurred.
A wait step work item is used to suspend the execution of a workflow or of a branch within a workflow until the necessary events have occurred.
Features
Wait step work items are not displayed in the Business Workplace. You can only locate these work items using the work item selection.
A wait step work item can also be identified with the type code E in the technical information on the workflow.
A wait step work item can only exist in the statuses in process, completed, and logically deleted.