Can I use Jaccard index to calculate similarity between set and multiset?
As I know Jaccard is defines as the size of the intersection divided by the size of the union of the sample sets,
that is $J(A, B) = |A \cap B| \, / \, |A \cup B|$
Now if I have a set $s$, $s = \{\text{special}, \text{words}\}$ and a multiset $m$, $m = \{\text{term}, \text{special}, \text{words}, \text{special}\}$
How can I use Jaccard index to take repetition into consideration?