This depends on several factors from skill level, playing conditions, adherence to rules, frequency of play etc... Some "golfers" go out to the beach with a bucket of balls and "lose" them all, while other highly skilled "golfers" restricting their Golf to golf courses "lose" very few balls; say, in regulation perhaps a ball every few rounds, and most often merely retire their balls when they wear out sufficiently to effect playability.
Speaking from experience, and thinking only of time spent on golf courses, most skilled players (say less than 6 handicap) probably lose 0-1 balls/round, good to average players(6-18+ handicap) 0-3 or 4 balls/round.
Of note it depends on how this statistic is scored. There is the semantic difference between hitting a ball O.B. being considered a "lost ball" vs. not being able to find the ball that was just hit (perhaps even including special cases like plugging in the fairway and getting lost).
never
25
Prefixes distinguish among golfers, pro golfer, amateur golfer. But there aren't many synonyms for the term, golfer. Here are a few slangy, pejorative ones: Army golfer - one who hits the ball out of bounds to the left one time to the right the next; duffer - a mediocre or inexperienced player; hacker - synonym for duffer; lumberjack - a golfer who hits a ball into the woods several times during a round; mouth wedge - a golfer who tries to gain an edge by needling other players or excessively talking to affect their play; scratch - a golfer whose handicap is zero.
Three times.
A player can bounce the ball as many times as they like while moving, as long as they do not hold the ball for more than three seconds.
Three times
69 times
It depends what height you drop the ball and what surface the ball is being dropped on.
A professional golfer, maybe two per game at most. For the amateur, perhaps up to a half dozen if one is prone to hitting into out of bounds and/or water hazards where retrieving the ball is impossible. or A professional golfer will use around 4-6 per round, this is because the covers of the balls are so soft and the grooves are so sharp that the cover gets cut very easy which is not desirable. But they will not necessarily lose many. An amateur could use anything from 1 to about 10, there is no set number, but there is a higher chance they will lose balls, as above.
Professional golfer John Cook has won 11 times on the PGA Tour and 4 times on the Champions Tour.
two
2