I'm looking for a word or phrase to describe how something takes simple work, but a lot of it.
For example, sorting a stack of documents fits the bill as it is not hard if you had a few, but really hard when you have a stack of a few hundred of them.
In my language I would say something along the lines of "It's black work" (I don't think it has anything to do with black people...).
"Drudgery", on the other hand, doesn't seem to fit. According to some googling it seems it means simply hard work with no implication of said work being easy in small amounts.
Although, in Merriam-Webster the definition looks very close to what I'm looking for:
Full Definition of drudgery
: dull, irksome, and fatiguing work : uninspiring or menial labor
What ruins it for me is the "fatiguing" part. Am I just misunderstanding and already have found my word?