Hi serph,
I agree with the suggestion of Canadianwomen.
You can put NA for column 12.
But my opinion is that it would be better if she make a note in an additional sheet of paper that she visited ------(place) twice and each stay is not exceeding 6 months. It is because in case (?) in future when the reviewing officer at the immigration section find from her passport that she has traveled to ---- (place), there could be a possible query for that and would delay the processing.
Please be noted that the guide says about a
Police clearance from any country where he/she lived for a period of
6 consecutive months or more.

You may do what you feel appropriate.