Alternator...

COUPLE OF QUESTIONS.
WHAT SHOULD THE VOLT METER READ/SHOW AT.....I.E.WHAT'S THE NORM ?
IM SHOWING 13.7-13.9
IS THAT OK ? CAUSE AT TIMES IT SEEMS LIKE THE BATTERY DIES AND I NEED A JUMP START AND I'M GOOD FOR A FEW WKS AGAIN...DEPENDING ON HOW MUCH I START AND STOP THE CAR DURING THE DAY AND FREQUENCY BETWEEN THESE TWO ACTIONS.

ONE MORE QUESTION HOW MANY WORDS SHOULD BE GOING TO OUR FROM THE ALTERNATOR (connections)
THANKS.
MAPS