The hours need to be in the same Category of aircraft (Airplane, Rotorcraft)
§61.159 Aeronautical experience: Airplane category rating.
(5) 250 hours of flight time in an airplane as a pilot in command, or as second in command performing the duties of pilot in command while under the supervision of a pilot in command, or any combination thereof, which includes at least—
§61.161 Aeronautical experience: Rotorcraft category and helicopter class rating.
(3) 200 hours of flight time in helicopters, which includes at least 75 hours as a pilot in command, or as second in command performing the duties of a pilot in command under the supervision of a pilot in command, or any combination thereof; and