When the knight's sentence is revised, what punishment is he given?

In this tale, the Wife of Bath tells of a knight who saw a
young woman and raped her.  When King Arthur heard about this, he was extremely angry
and he ordered that the knight should be executed.  But then the queen intercedes with
King Arthur.  She persuades him that he should not have the knight executed right
away.

So King Arthur lets the queen have her way -- he
gives her the knight and lets her decide.  What she tells the knight is that he has to
go out and figure out what it is that women want.  Here is a quote to that
effect:

I’ll
grant you life if you can tell to me
What thing it is that women most
desire.
Be wise, and keep your neck from iron dire!
And if you
cannot tell it me anon,(50)
Then will I give you license to be
gone
A twelvemonth and a day, to search and learn
Sufficient answer
in this grave concern.

I
believe that she is doing this because his crime is one that shows that he does not
really care about women.  So his punishment is to be forced to really care about women
and find out what they are really like.  In that way, it's a pretty fitting
punishment.