22 pumps is not so much, it starts to be low.
It could be the spheres, if they have 9 years or more, think replacing them
Could be air in the system, bleeding brake pressure switches could help.
Could be inside the brake pressure switches, stuck, dirty....
Various things to investigate.
Brake spheres are CRUCIAL. No more gas inside = NO MORE BRAKES
You will press the brake pedal, the car will just not react and will keep on driving....
97 Continental R