Plan pomodoro study sessions and count total focus time.
The Pomodoro technique alternates fixed focus blocks with short breaks, and a longer break after every few blocks. Because the long break lands on a cadence, the number of blocks that fits in a session is not a clean division — this walks the clock block by block and only counts a block if the full focus period fits in the time left, which is why the focused total is always a whole multiple of the block length.
Cycle
focus block, then short break; after every Nth block take a long break (3x short)
Focus share
focused minutes / elapsed minutes x 100
Because a break after your final block does not consume study time — the session is already over. The walk stops as soon as the next block or break would overrun the time available.
Not necessarily. The technique's value is the enforced break; blocks beyond about 50 minutes tend to lose focus, which is why 25 minutes is the classic default.