Resource
This article contains a detailed timeline of the life of Frederick Douglass. This resource has numerous dates, commenting from the publication of The Narrative of the Life of Frederick Douglass: An American Slave to his influence on Women Rights. These dates help show how active Douglass was in   his era, especially in the Abolitionist Movement.

http://www.math.buffalo.edu/~sww/0history/hwny-douglass-family.html