This is the 10568th most frequent Polish word.
dobowy
"Dobowy" means "daily" or "24-hour."
Here, 'dobowy' is used as an adjective to describe the noun 'plan' (schedule), emphasizing that it pertains to the duration of a day.
Mam dobowy plan zajęć.
I have a daily schedule.
In this context of 'dobową', it modifies 'stawkę' (rate), specifying it covers the duration of a single day.
Hotel oferuje dobową stawkę za wynajem pokoju.
The hotel offers a daily rate for renting a room.
Here, 'dobową' is an adjective linked with 'aktywność' (activity), indicating observation across a full day.