Voltage divider which will work for low and high frequency signals
The ratio of R1 to R2 has to match the impedance ratio of XC1 to XC2. If that condition is met then the network will have a flat frequency response.

So choose R1 to have the right ratio at DC (say 10 x R2) and pick C1 so that its impedance is ten times that of C2. This inevitably means that C2 is ten times C1 in capacitance terms.