@kritiper Re. the second part of your post, it is still number of people isn’t? I mean we use the crowd, ..., bunch etc., of people because we don’t have the exact number. Re. the size of the crowd, (say 3 blocks long 5 deep will get us an approximate number.
@Zaku then A mound is an amount yes, but not the persons, right?
@snowberry I agree with your last statement, but I don’t think you mean “it depends on whether you are talking about individual persons or their groups.” since a platton can be counted, so can a tribe, a group.
@LostInParadise Yes,. I’ve always heard “size of land” and how many (acres etc.) of land.
@ScienceChick English.
@Demosthenes Yes some people do say “amount of people”, and it’s lately. It is not as bad as “Can you learn me how to…”, but it is incorrect. Aren’t there words/terms that are informal but not incorrect? I think so, I just can’t think of an example right this minute.