There may be a steep learning curve ...
Can someone explain the axes of the graph in which "steep learning curve" equates to "takes a long time" ??I can.
It requires that you put knowledge on the X-axis, and time on the Y-axis, which is completely at odds with the usual way of doing things.
Like many idioms you have to read this as meaning one thing even though it says another. You have to read this as "it takes a long time," even though that's not what it says.
Language - I don't know how it works.
And sometimes it doesn't.
</rant>