The natural indicator to look at, the federal funds rate, is measured in nominal terms, so that large movements in the rate of inflation can mask the underlying stance of policy. Moreover, an easing of a certain size might be considered relatively more or less aggressive depending on the magnitude and nature of the shocks hitting the economy.
Still, in the current cycle, the Fed began lowering the federal funds rate two months before the official cyclical peak (as identified by the National Bureau of Economic Research) and lowered rates 450 basis points over the first year of the easing and 100 basis points over the second year.