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Is there simple way to get historical fundamental data?

I was trying to compute based on historical fundamental data.
Currently I used custom factor with window length 1825(about 5 years). But it takes too long to load such long window length data and gives error "InterfaceError: connection already closed".
If I reduce the window length, it works.

Since the fundamental data changes usually on seasonal basis, is there any simple way to get fundamental data on seasonal basis?

Best,
Quan