From the early Church Fathers to now.
“We have rejoiced for the days in which thou hast humbled us: for the years in which we have seen evils.”
“Cause us to rejoice according to the days that You afflicted us Cause us to rejoice in the days of our Messiah according to the number of days that You afflicted us in the exiles and according to the number of years that we experienced evil.”
The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.