Darrol Stinton, ‘Flying Qualities and Flight Testing of the Aeroplane’ writes:
“Attempting to make a general rule about spinning is like making a rule about a shark: there is no rule”. Darrol Stinton goes on to outline the recovery from a spin using the term;
Standard Recovery Drill or Procedure
(1) Throttle closed
(2) Ailerons neutral
(3) CHECK that you are in a spin, not a spiral, and also the DIRECTION of rotation.
(4) Stick BACK (i.e. conventional elevator-UP)
(5) Rudder FULL against the indicated direction of turn
(6) PAUSE (say long enough to count one hundred-two hundred-three hundred) allowing the rudder to bite and take effect. THEN:
(7) Move stick progressively FORWARD (elevator NOSE-DOWN) until rotation stops.
(8) EASE OUT of the ensuing dive.
The above is the technique applied when testing an aircraft for certification and for the most part there's little more than lip service to this published in the POH. It is a matter of required compliance on the part of the manufacturer.
I've been concerned for many years with regard to the language used, such as; "briskly", "pause" and "progressively" without any of these words being defined. Briskly could, in the heat of the moment, be applied too much and tip the aircraft inverted. A pause could be anything in a high adrenaline moment and delay the recovery too long similarly the term progressive. Stinton does offer some definitions but few manuals do so.