Count
Number, Amount
In the winter, the woman has to go through all the rice and count each individual grain. Once she's counted all of them, she'll have an amount / number so that she can split them up accordingly.
すう
かぞ, かず
None
Why are you so low on rice? It's because someone sued (すう) your farm and took everything you owned. So, you had barely enough rice (or not enough).