Yes, it is possible to calculate the total dividends received per asset over a certain period of time. To do this, you need to use the annual percentage yield (APY) of the asset in question. The APY is a measure of the return on an investment over a certain period of time and can be used to calculate the total dividends received over a given period. To calculate the total dividends received over a 90-day period, you would need to multiply the APY of the asset by the amount of the asset held for that period. For example, if you held 10 TRX for 90 days and the APY of TRX was 5%, then the total dividends received would be 0.5 TRX (10 TRX x 0.05 APY).