Which data accessed most

Hi Experts,

Do you know how to check which data accessed on the cube most like if I've cube which is having 4 yrs worth of data then how I know which year is accessed most or which time slice is accessed most by users?

So that it will help me to take decision for archiving strategy to categorize Hot, warm and cold data.

I know we can check through statistics which cube is accessed but not sure how to check for that cube what are the time slices accessed most.

Thanks