SEPTA introduced new schedules for Regional Rail on July 5th, including the Manayunk/Norristown line. From SEPTA’s announcement:

The new July 5 Regional Rail schedules include some notable improvements that will translate to more predictable and reliable service, and more capacity to major destinations. Additionally, as SEPTA continues to increase the number of train cars available for service, trains will be longer and provide more space for riders.

You can view the schedule here.