Here are the park period percentages if APR was set to 75% for all durations…
5.7 Days per Park Period = 1.17% <-----> 64 Park Periods per Year = 75% APR
11.4 Days per Park Period = 2.34% <------> 32 Park Periods per Year = 75% APR
22.8 Days per Park Period = 4.69% <------> 16 Park Periods per Year = 75% APR
45.5 Days per Park Period = 9.37% <------> 8 Park Periods per Year = 75% APR
91.0 Days per Park Period = 18.75% <------> 4 Park Periods per Year = 75% APR