The phrase "countless hundreds" means a very large, indefinite number of hundreds. It suggests that there are so many hundreds that it is impossible to count or determine the exact number. Full definition
They too will be spayed and neutered, saving countless hundreds of lives. (animaladvocates.com)
I don't think H.P. Lovecraft could have predicted that his beloved short - stories would become entrenched in the world of boardgames, acting as the inspiration for countless hundreds of titles that purport to be inspired by the works of someone with an intense imagination and propensity for horror. (wolfsgamingblog.com)
Just look no farther than our present owner, he has received countless hundreds of millions, saw the value of this club increase threefold and yet we still pay the some of the highest prices in the World and continually cry poor when we go shopping for players on the open market. (justarsenal.com)